Why This Question Doesn't Have One Answer
There's no single federal or state rule that says a specific number of days for how long a guest can stay before they count as a tenant. Guest limits almost always come from the lease itself, not from a statute, so the honest first step is to read your lease's guest clause rather than assume a rule of thumb applies to you.
What to Look for in Your Lease
Look for a clause about "guests," "occupants," or "visitors." It typically covers:
- A maximum number of consecutive days a guest can stay
- A maximum number of total days per month or per year
- A requirement to notify the landlord about a long-term guest
- A statement that a guest who exceeds the limit must be added to the lease or must leave
If your lease is silent on guests entirely, your landlord may still object to a guest who is effectively living there, but they'd generally have to point to something else, like an occupancy limit or a requirement that only named tenants reside in the unit, rather than a specific guest clause.
For example, a lease might say guests can stay up to 10 consecutive days or 20 days total in any 60-day period, and that anyone exceeding that must be added to the lease as an occupant. If your partner has effectively been staying at your place five or six nights a week for the last two months, they're likely well past a limit like that, even though it doesn't feel like a formal "move-in" from either of your perspectives.
When a Guest Can Become a Tenant by Conduct
Tenancy isn't only created by signing a lease. Someone who pays rent, even informally to a housemate, receives mail there, keeps their belongings there, and stays for an extended period can be treated as a tenant regardless of what any lease says — see Do I have rights without a written lease? for how that generally gets decided. That cuts both ways: it's part of why landlords care about guest limits, since an unauthorized long-term guest can develop tenant-like rights and become much harder to remove than a true short-term visitor. It also means that if you're the one hosting a long-term guest, you may unintentionally be creating a legal tenancy that then requires the same formal process to end that any other tenancy would, rather than simply asking them to leave.
Familial Status and Guest Policies
A guest policy cannot be enforced in a way that discriminates. Federal law prohibits denying or restricting housing "because of race, color, religion, sex, familial status, or national origin," so a landlord can't apply a stricter guest limit to a tenant with children, or treat a visiting relative differently because of a protected characteristic, than they would for any other tenant's guest. In practice, this comes up most often with children who split time between two households, or with an aging parent who stays for extended stretches — a landlord enforcing the same neutral guest policy against everyone is generally on solid ground, but singling out a tenant with kids for extra scrutiny is not.
How This Differs From an Occupancy Limit
It's worth keeping "guest limit" and "occupancy limit" separate, since leases sometimes blur the two. A guest limit is about how long a visitor can stay before needing to be added to the lease. An occupancy limit is a hard cap on how many people, tenants and guests combined, can live in the unit at all, usually tied to the number of bedrooms and driven by local building or health and safety codes. A long-term guest can run into either problem: they might be within your guest-day limit but still push the household over the unit's occupancy cap, or vice versa. Check both figures in your lease separately rather than assuming one covers the other.
What to Do If Your Landlord Says Your Guest Has Overstayed
- Re-read your lease's exact guest language — many disputes come down to a landlord misremembering or exaggerating what the lease actually says.
- If your guest is genuinely approaching or past the limit, ask your landlord in writing about adding them to the lease instead of letting the issue drag on.
- Keep any communication about the guest in writing, including any approval your landlord gave informally.
- If you believe the enforcement is discriminatory or retaliatory, document it and consider filing a housing discrimination complaint.
Know Your Lease Before It's an Issue
Guest disputes usually surface after the fact, when it's already tense. Honestkey™ reads your uploaded lease and flags the guest, occupancy, and subletting clauses up front, so you know your actual limit, not a guess, before you have a long-term visitor.