hrgdevBuilds a day ago

I built a small tool to clarify how much late fee a landlord can legally charge (and when) in each U.S. state.

Rent laws vary widely: some states set a fixed dollar cap, others a percentage, and a few use only “reasonable” language that’s open to interpretation. Many renters and landlords have no easy way to check what’s actually allowed without reading the statutes themselves.

This project compiles those laws into an instant calculator. Enter rent amount, due date, payment date, and state — it shows the lawful late fee limit, grace period rules, and citation.

It started as a curiosity after seeing conflicting answers online. The goal is transparency, not advocacy; all data is drawn from current state statutes.

The app is lightweight, built in Replit, and runs entirely client-side. I’d be interested in feedback on legal interpretation consistency, data sourcing, or UI clarity.

  • limagnolia a day ago

    Utah appears to be calculating incorrectly, the text says "10% of rent or $75, whichever is GREATER." But it is doing the opposite, showing the lessor of 10% or $75.

    • limagnolia a day ago

      New Hampshire has the same bug.

      • corndoge a day ago

        Other states do as well.

        • pton_xd a day ago

          "We compile state-level rent late-fee rules from official statutes and housing authority publications with AI-powered consistency checks."

          Needs a higher-powered AI, I'd say.

        • gruez a day ago

          Given that OP said it was "built in Replit"[1], I'm tempted to believe AI misgenerated the underlying calculation code.

          [1] Replit bills itself as "an AI-powered platform for building professional web apps and websites."

          • zahlman a day ago

            I always thought Replit was supposed to be a pastebin site with built-in sandboxed code execution, so people could demo Python snippets and what-not. What happened?

  • axus a day ago

    I love the ambiguity in who the tool is for. For renters, learning about their rights and fighting illegal fees. For landlords, charging the maximum amount permitted under the law.

    • limagnolia a day ago

      Or landlords who want to follow the law, but aren't sure what it is, trying to make sure they are doing things right.

      • ChrisMarshallNY a day ago

        Here on Long Island (NY), most apartments are illegal (addition/remodeled single-family homes). Many of them make you sign a lease, anyway, but they can get dismissed by any law student.

        Every now and then, some municipality claims that it will be "fighting illegal apartments," but they die quick deaths. If they got serious about it, the homeless population would explode, and a lot of folks would leave the state.

        Also, I believe that most of the rules that apply to apartments, come from municipalities, not states.

        • terminalshort a day ago

          This is the failure mode of bureaucratic government. The personality type of bureaucrats means that the rules will proliferate endlessly. Karens never sleep. Eventually the rules get so onerous that it becomes impossible to comply and everybody operates in violation of the rules. Everybody know that actual enforcement of the rules would be catastrophic, so they noncompliance is ignored. The economy reverts to the same unregulated and "unfair" state that the ruling Karens feared in the first place, but arbitrary enforcement continues anyway as the bureaucrats need to justify their existence by continually enforcing the rules. The number one rule of business becomes "keep your head down" because anything that attracts the attention of the bureaucrats will be immediately enforced, while the other 99% of violators are allowed to peacefully continue violating. Stagnation and slow decay takes hold as any sort of disruptive innovation is instantly shut down.

          • jjmarr a day ago

            The "true" failure mode is bureaucrats discovering they can collect bribes from 99% of businesses to not enforce the rules, since nobody notices noncompliance and enforcement is expectedly arbitrary.

          • bombcar a day ago

            When I am dictatorKing, I will make the first line of the constitution (which won't matter because I'm dictatorKing (yes, the camelCase is important (yes I'm nesting parentheses))) be that a mandatory and invulnerable defense against any crime, claim, or tort is that the law is not enforced regularly.

            • jermaustin1 a day ago

              How does that work for something like speeding, where they will charge you with everything, then let you off with a different infraction that doesn't actually have anything to do with the laws you supposedly broke.

              They do that enough times, and all of a sudden now speeding is legal because no one was charged with speeding, but with "driving with an invalid instrument".

              This would basically get rid of the "easy plea downs" and basically make fighting against the book the norm.

              IRL example:

              I once pulled out of my driveway and passed a stopped school bus (with lights on, but no stop signs extended) on a divided highway (barrier between my side of the road and theirs), a cop saw me do that, went around the barrier and pulled me over a couple minutes later. I was charged with something that was going to instantly take my license away.

              I went to my local courthouse on the designated day, the prosecuter brought me in and told me he would drop the charges to failure to stop at a stop sign. I said I didn't pass a stop sign, and that the bus didn't have them extended, just stopped with lights on, across a highway from me.

              Prosecutor said, that I'm allowed to argue that in front of a judge along with paying some large sum, and potentially lose my license, or take a point, and pay $150 today and be done with it.

              I chose the latter.

        • gruez a day ago

          >Here on Long Island (NY), most apartments are illegal (addition/remodeled single-family homes). Many of them make you sign a lease, anyway, but they can get dismissed by any law student.

          What does this mean in practice? Courts won't enforce late fees or unpaid rents? Landlords can't evict bad tenants? Renters can terminate leases without any penalty?

          • ChrisMarshallNY a day ago

            Pretty much.

            Landlords get in a lot of trouble, for renting illegal apartments.

            I have friends that rented apartments, and had Pacific Heights-type[0] problem tenants.

            The COVID era was a horror. Many tenants just stopped paying rent entirely.

            [0] https://en.wikipedia.org/wiki/Pacific_Heights_(film)

            • pixelatedindex a day ago

              > Landlords get in a lot of trouble, for renting illegal apartments.

              Do you have a source for this because I’m not convinced. Maybe a small portion do but the majority face no penalties. When I was in college the number of questionably legal homes for rent was insane, but I didn’t have time to go after them. A friend of mine did and won, but it required a lot of time. Most of the time the landlord does what they want and the renters don’t have the resources to go after them.

              You make it sound like it’s the renters who take advantage of the landlords but most of the time it’s the landlords who do whatever they want. The ones who stopped paying rent probably were doing so legally because a lot of them were forced to not work.

              • terminalshort 21 hours ago

                In this case it sounds like "do whatever they want" for the landlords means entering into a mutually agreed upon contract to rent their house when they aren't allowed to by the nonsensical nitpicky rules. But "do whatever they want" for the tenants means squatting. So, yeah, it sounds like the tenants are the ones taking advantage. Tenants can get away with murder.

                • pixelatedindex 20 hours ago

                  Look at rentals in college towns… education is already expensive so the tenants just want cheap housing. This attracts many landlords of the slumlord variety but because there’s a contract involved they’re given a pass. But even then they don’t necessarily abide by the contract and students don’t have the time and money to deal with small claims court so they just pay up (or accept the loss). Landlords absolutely take advantage of this situation.

                  As for squatters, yeah they’re taking advantage of lax enforcement but they’re few and far between despite what you’d read on the internet.

                  > Tenants can get away with murder.

                  Sounds like hyperbole

                  I guess my rant is just that renters get shit on because of a few squatters but landlords barely ever get criticized because there’s a contract involved. Some of the stuff I’ve read on the contracts isn’t even legal but a lot of tenants aren’t savvy to cross check laws or they’re owned by huge conglomerates who use stuff like RealPage.

                  • terminalshort 19 hours ago

                    I will admit to some bias here. I have been renting now for 22 years and have never had anything beyond a minor problem with a landlord that couldn't be resolved by a phone call. This seems to be the case for 90% of people I know. Then there's that person that is always having problems with landlords / neighbors and I tend to think the problem isn't actually the landlord / neighbors.

                    • pixelatedindex 18 hours ago

                      Yeah I can understand. In college I certainly lived with some folks who trashed the place. After I graduated and rented in nicer parts I haven’t had as much of an issue. Except most of them want to keep as much of the security deposit as possible and start coming up with bullshit costs with no itemization. I admit I’m biased against landlords - I hate how much of the costs can be passed down to the renter, like they aren’t making enough already. The best ones IME are the ones who have one or two properties, and the ones who have close to a dozen are a nightmare. Never been happier after buying my own place.

                      • terminalshort 15 hours ago

                        > like they aren’t making enough already

                        This is completely irrelevant to anything. It's none of the business of the tenant how much the landlord is profiting, and it's the obligation of the landlord to return the deposit fairly even if he is losing money on the property. Your experience is the opposite of mine in terms of small vs large landlords. Where I'm from the corporate landlords don't even charge deposits when you have good credit and income.

                        • pixelatedindex 8 hours ago

                          > This is completely irrelevant to anything. It's none of the business of the tenant how much the landlord is profiting

                          It certainly feels relevant when they start making excuses about why they have to charge you for things they cannot charge you for, claiming how expensive things are now. Operating costs have gone up for everyone, that doesn’t mean you get make things up to pass down the cost. But I do understand your point.

                          > Where I'm from the corporate landlords don't even charge deposits when you have good credit and income.

                          True, that has been my experience as well and I wasn’t explicit about that. The last couple of places we rented were from corporate ones and have had 0 issues compared to the mom and pop ones.

                      • ChrisMarshallNY 16 hours ago

                        > Never been happier after buying my own place.

                        Around here, most of the landlords are people just like you. They own a house, and want to get a bigger one, so they either rent the old house (those are often legal rentals), or they divide the house they live in (or their old house), and rent the apartments (those are the ones that are usually illegal).

                        They aren't land barons or slumlords, and they get pretty screwed, when tenants abuse them. They can lose everything. One family I knew, had to let the house go into foreclosure, because the tenant refused to move, and refused to pay rent. I don't know what happened, after that, but I know that it's nearly impossible to sell a house that's occupied, and the tenants will often abuse the house before they are evicted (which can take months).

              • bombcar a day ago

                Anything legal involves time and effort, but you certainly cannot do a "rapid eviction" on an illegal or unscheduled apartment.

                Landlords naturally (e.g., by the nature) have the upper hand because they have the desired thing - the rental.

                Tenants often have the legal upper hand, but the whole job of the landlord (even good ones!) is to work out which tenants know how to play the game and not rent to them.

                • pixelatedindex 20 hours ago

                  > but you certainly cannot do a "rapid eviction" on an illegal or unscheduled apartment.

                  But isn’t that the risk? You’re doing illegal stuff so you’ll attract sketchy folks.

                  > whole job of the landlord (even good ones!) is to work out which tenants know how to play the game and not rent to them.

                  Sounds like discrimination to me, tbh. But you can’t prove it so that makes it “fair” I guess

              • ChrisMarshallNY a day ago

                I probably could find references, but I’m not really up for arguing on the Internet.

                The laws are quite harsh, but enforcement, not so much.

          • hrimfaxi a day ago

            Yes, at least in some towns on the US east coast, if you didn't register your rental with the town. And not only that, but you also would have to pay treble damages and all moving costs associated with them vacating your illegal rental.

            • ChrisMarshallNY a day ago

              Yup. That treble-damages thing is a kicker. Can't get it, though, if they don't have it.

              Most folks don't want to saw off the branch they are sitting on, though, so they play nice.

              • hrimfaxi 20 hours ago

                Would be an interesting service if someone developed a scraper to identify these illegal rentals. Why get an airbnb when you can get paid to stay somewhere for a few months?

        • Spooky23 a day ago

          It’s not the homeless population, it’s more to do to with the folks who own the apartments. Local politics and local real estate are birds of a feather.

      • ryandrake a day ago

        This is just a nicer way of saying what OP posted. "I want to charge as much as I can, but I want to follow the law and do things right."

        • eadmund a day ago

          Everybody wants to charge as much as he can. Workers do the same: we all want to charge as much for our labour as possible. Unions do the same thing too.

          Everyone also wants to pay as little as he can, too.

          Fortunately, as long as there are many buyers and many sellers, the market tends to find efficient prices. When there is a monopoly or a monopsony, though, prices get out of wack.

          • sojsurf a day ago

            One thing I've noticed is that our current economic model, which builds in constant inflation, forces buyers and sellers to have this conversation non-stop. Why are prices higher? Because our costs are higher. Or because everyone else is charging more. Didn't you just raise prices recently? Yes...

            If you don't increase your prices with inflation, your business will not be sustainable in the long term.

          • Bjartr a day ago

            > Everybody

            Not everybody everybody. Some people want to charge/pay/receive the maximum reasonable amount. Where "reasonable" is informed by social norms. The existence of so many amoral corporations, and sociopathic individuals running them, has absolutely skewed social expectations though.

            Such people are certainly less common, but they do exist (anecdata of one, me)

            Homo economicus does not actually exist.

            • walkabout a day ago

              My experience is that kids have to be taught “‘fair’ is what the market will bear” because they start out feeling quite strongly that it’s not true.

              Tons of kids aren’t taught that, some of them start businesses, and they may struggle to make ends meet (or at least to thrive like they could be) because raising prices to market rates feels so unfair to them that they won’t do it unless prodded to and told it’s ok by someone else (and they still might not)

              I definitely am not convinced market-rate-is-ethical-and-fair is natural thinking for most people, or the kind of thing they want to do.

              (I’ve been the one telling people they should raise prices and I still can’t shake the feeling that it’s kinda wrong…)

              • terminalshort 21 hours ago

                > kids have to be taught “‘fair’ is what the market will bear”

                Because it seems like the normal default for humans is that "fair" means when I sell something I take the highest offer I can get, but when I buy things the seller should give me the lowest offer he can while meeting his expenses or he is being "greedy." If you don't believe me just read the HN comments on any financial topic.

                • walkabout 19 hours ago

                  Nope, it works both ways, at least for lots of folks. The other attitude often (in my experience, most of the time) has to be explicitly taught or conditioned in from getting fucked enough times and deciding you may as well be fucking people too.

                  • terminalshort 15 hours ago

                    Not liking the price but paying it anyway isn't "getting fucked" like you and so many other people seem to believe.

                    • walkabout 15 hours ago

                      K. But from what I’ve seen most people have to be taught your way of thinking.

    • Fraterkes a day ago

      If you look at the other tools on the page, there's stuff for property-management and sending rent-reminders. I guess they know what part of their userbase is the most moneyed.

    • terminalshort a day ago

      It's a tool, and like any tool it should be as neutral as possible.

  • candiddevmike a day ago

    I thought this would be for tenants, but this seems more geared towards landlords. Most landlords have some kind of SaaS platform that will automate all of this for them as part of rent collection, I don't think you'll get many bites on this TBH.

    I'd love to see some kind of 50 state tenant resource center, geared towards providing tenants with advice and legal resources.

  • vjekm a day ago

    [flagged]

    • gruez a day ago

      Most people aren't lawyers and therefore won't know what statues to read, so they'll need to search/ask AI, which is pretty much what this site does.

pseudocomposer a day ago

At least for North Carolina, it's wrong/self-inconsistent. The quoted text (and linked NC legislation) says the max is:

> $15 or 5% of rent, whichever is GREATER. 5-day grace period. One-time fee per late payment.

But this site seems to say the legal maximum is whichever is lower (i.e., it won't go above $15).

ecshafer a day ago

There are laws at the county and city levels as well as state levels. So this is insufficient.

redmattred a day ago

Curious what your process for gathering and verifying the legal information was

  • bpt3 a day ago

    Based on how inaccurate the information is and the fact that there is no support for local (city, county, town, etc.) regulations, I would say it was a very simple prompt to an LLM with no additional verification.

dotnet00 a day ago

I don't know how I feel about the concept of late rent fees...

On one hand, you did agree to the payment schedule when you signed the lease, but on the other hand, tacking on fees to someone who is already struggling to pay, to support mainly parasites responsible for creating a lot of the issues facing young people, is also not great.

  • everforward 19 hours ago

    Not a landlord, but landlords have financial obligations they need to meet as well, and not getting rent can create issues there. They still have to pay taxes, insurance, repairs, etc.

    I think late fees are fine, but shouldn't be enforceable in the event the lease is cancelled by either party (ie eviction or early termination). Tenants would still owe back rent, but not punitive fines for being unable to pay.

    I'd also say there should be some method to punish landlords for illegal terms in leases, like late fees in excess of what the law allows. I watch court streams sometimes and the percentage of landlords who have illegally high late fees is shocking and I've never seen a punishment beyond "you can only tack on late fees of $X by law".

    • dotnet00 18 hours ago

      Yeah, I get that landlords have financial obligations too, which is why I'm torn on it.

      The mechanism exists so good landlords (who take the responsibility of having a tenant seriously) aren't scammed out by bad renters, but, it seems like most landlords aren't that way, instead utilizing every tool available to maximize their property value and minimize the ability for renters to own their own properties, regardless of the social harm they cause.

  • bpodgursky a day ago

    People are lazy. Without penalties, nobody will ever pay a bill. Doesn't matter if they are rich or poor. They could have $1mm cash sitting on their desk and unless you motivate them, they're just not going to open the bill.

    That's just the reality of sending bills or invoices. Half the time it's not about malice, just no reason to bother being timely.

    • dotnet00 a day ago

      This is simply not true, the vast majority of people continued to pay their bills and rent on time through Covid despite financial pressures and suspension of most penalties.

      The cases of abuse are so egregious precisely because most people were just normal well meaning people doing their best to meet their obligations.

    • grafmax 21 hours ago

      There’s really nothing lazier than making money simply by owning more than others. Such a person doesn’t have to produce anything of value. They can simply just use their outsized wealth to buy something others need, then charge money for access to it. This drains cash from those who have no other option than working for a living while their own coffers grow. Not just lazy, this actively makes the economy less efficient by increasing the cost of living and necessitating higher wages from employers simply to finance parasitism, which means value-producing businesses become less competitive also.

      • terminalshort 21 hours ago

        I can think of one thing lazier. Complaining on HN about what other people do to make money while having no understanding whatsoever of the business they engage in.

      • bpodgursky 19 hours ago

        Why don't you get into the game? Sounds easy. Buy an apartment and rent it out! Put some money where your mouth is.

goldenCeasar a day ago

This looks something that could work nicely with my calculation DSL (https://github.com/amuta/kumi) This is one of the scenarios that was in my head: auditable/exportable/reusable tax-related calculations schemas.

shimmers a day ago

Being a landlord is one of the most directly parasitical things a person can do to another person.

I see all the bugs here about how it minimizes fees by reversing a particular comparison, and for a second I got excited -- maybe it's a subversive site? But no, just AI blunders.

josefritzishere a day ago

Sounds like a great tool. But it's sad that it needs to exist.

  • bpt3 a day ago

    Sad in what way?

    Renters will always exist, and some will be unable or unwilling to adhere to the contract they signed. Like all contracts, there are penalities for non-compliance (on both sides).

    • grafmax 21 hours ago

      These leases generally are not a contract between equals. One party owns extra housing. The other owns none and gets charged for this fact. It’s institutionalized exploitation. Legal, sure. People being unable to pay for a basic necessity while others have so much that they can profit off it - its not unreasonable to call this “sad”.

      • bpt3 20 hours ago

        Everyone pays for shelter in some form or fashion, and many people do not want to and/or should not own their own home.

        It's not considered exploitative to charge for groceries, clothing, or other necessities, so why is housing seen differently by some?

        • grafmax 20 hours ago

          Groceries and other necessities are produced. Rent and mortgage payments are based on selling access to resources - nothing of value is produced through rent extraction. It is a purely parasitic process economically.

          There is indeed a case to be made for universal access to basic necessities but the case against rent extraction is more basic than that.

          To your point about people preferring renting to owning who have the option of both, I am not directing my argument against this case but the general case instead - most people do not have the option of affording housing except through the rentier capitalist avenues of rent or mortgage. It is these people who are being parasitized by this form of economic activity.

          • bpt3 18 hours ago

            > Rent and mortgage payments are based on selling access to resources - nothing of value is produced through rent extraction. It is a purely parasitic process economically.

            I have to assume you have never been responsible for maintaining a property. Unless someone is renting out a cave on a triple net lease, your statement above is hilariously inaccurate.

            > most people do not have the option of affording housing except through the rentier capitalist avenues of rent or mortgage.

            If most people can't afford it, then why do most people live in a home that is owned by a member of their household (either themselves, or their parent/guardian)?

            • grafmax 18 hours ago

              1) Costs of maintaining a property are productive but typically less than 50% of what rent pays for. The rest is purely extractive going to rentier profit and mortgage (what I’ve been talking about).

              2) Less than 40% of households are fully owned. The rest have mortgages or are rented.

              • bpt3 18 hours ago

                1. You did not start off talking about mortgages, you lumped it into your initial grievance once that didn't land. If you can't accept that debt exists and the reasons why it exists, you're going to be sorely disappointed by virtually all of your interactions with the rest of humanity.

                2. Of course, people with mortgages are still considered property owners legally and by nearly all of society.

                • grafmax 17 hours ago

                  Rentier capitalism is term that has been used to include mortgages for decades. It’s not my term. Mortgages and rent parasitize the working class. Rent extraction (broader than just literal rent) is nonproductive cashflows from the working class to the wealthy. You may cheer this on, that’s fine with me. I’m just calling a spade a spade.

                  • bpt3 17 hours ago

                    Sure, but you didn't use that term initially.

                    If you had, I would have probably not wasted my time on this discussion with a leftist who might as well be arguing that humans should breathe water instead of air.

                    • grafmax 16 hours ago

                      Sorry to disappoint you stranger. What I said applies to both mortgages and rent. And housing can be decommodified to our common benefit - for example, Vienna - it’s not some impossible goal. And on a wider level if you ever wonder why China is outcompeting us in many sectors it’s in large part because they have invested in their economy instead of letting rentier capitalists run rampant. It makes the workforce cheaper to employ. We on the hand are suffering a deepening housing crisis..

  • SilverElfin a day ago

    Yep. A lot of these regulations end up hurting small landlords because only corporate landlords with a large number of units can comply easily and absorb costs of bad tenants.

  • grafmax a day ago

    Our society prioritizes the narrow interests of rentier capitalists over the working class. Unfortunately this means the US is losing international competitiveness across more and more industries. For one thing rent extraction ultimately gets financed by employers through higher wages, thus productive business loses out to business from a region like China where costs of employment are lower. Rather than making economies more efficient like productive business is supposed to do, rentier capitalism means cash flows from the debtor to the creditor class, which forms a feedback loop as the creditor class is able to use this cash to buy more assets and extract more rent simply by expanding its circle of ownership.

    • bpt3 a day ago

      Real estate prices are controlled by supply and demand. If you want a lower cost of living than desirable places in the US, alternatives (like China, or the Rust Belt) exist.

      And if you think housing prices are bad in the US, you should look at the rest of the developed world.