Two different situations, two different answers
How much notice you owe depends first on what kind of tenancy you have. If you're on a fixed-term lease, your notice obligation, if any, comes from the lease itself — some leases require written notice 30 to 60 days before the end date if you don't intend to renew, and some require no notice at all if you're simply leaving when the term ends. If you're on a month-to-month tenancy, your state's law sets a specific notice period for tenants, shown in the table below.
Why fixed-term leases matter here
If your lease requires notice before the end date and you miss that window, many leases automatically renew for another full term or convert you to month-to-month at a higher rate — read your specific lease rather than assuming a standard number applies to you. This is one of the more expensive mistakes tenants make, because it's easy to assume a lease simply "ends" on its end date with nothing else required of you. Some leases also require a specific delivery method for that notice — certified mail, a tenant portal submission, or hand delivery to a particular address — and missing the method can matter as much as missing the date.
The month-to-month rule, and a mistake to avoid
For a month-to-month tenancy, the notice period is set by your state and applies to you as the tenant — see the state-by-state table below for the exact number of days where you live. It's worth being precise here, because a common and costly mistake is applying a landlord's notice requirement to a tenant's situation. In California, for example, a landlord generally must give 60 days' notice to end a tenancy of a year or longer, but a tenant ending a California month-to-month tenancy only has to give notice equal to one rental period — usually 30 days, not 60 (Cal. Civ. Code § 1946.1). The two notice periods are not the same thing, and confusing them can lead you to give far more notice than the law actually requires, or lead a landlord to demand more than you actually owe.
Some states also count the notice period differently, requiring it to end on a rent due date or the last day of a rental period rather than simply counting a flat number of days from when you give notice. Check the specific wording in the table below rather than just subtracting a number of days from today's date.
How to count your notice period
Once you know your state's required number of days, count carefully. If your state requires notice to end on a rent due date or the end of a rental period, giving notice in the middle of the month may not start the clock until your next due date, which can add most of an extra month onto your actual move-out date. If your lease or state doesn't specify a particular ending point, count calendar days, not business days, from the date your landlord actually receives the notice, not the date you wrote or mailed it.
What your written notice should include
Whatever your notice period, put it in writing, state your intended move-out date clearly, and deliver it in a way you can prove — certified mail, a dated email, or hand delivery with a signed receipt. Some leases specify exactly how notice has to be delivered; follow that method if one is specified, since a technically on-time notice delivered the "wrong" way can sometimes be treated as not given at all. Keep a copy of whatever you send, along with proof of when it was delivered.
What happens if you give short notice
Giving less notice than required can leave you on the hook for additional rent, even after you've moved out — some states allow a landlord to charge for the remainder of the required notice period regardless of whether you're still living there. Short notice can also affect your security deposit and your reference for future landlords, so it's worth double-checking your specific number rather than guessing or going by what a friend did in a different state.
How to protect yourself
Set a calendar reminder well ahead of your actual deadline, and use a notice to vacate letter or month-to-month notice to make sure your notice covers everything it needs to. Upload your lease to Honestkey and it flags your specific notice requirement and any automatic-renewal clause, so you're working from your actual lease terms rather than a number you're not sure applies to you.