Rent Increase Calculator
Raising rent from $1,500 to $1,575 is a $75 a month increase, or 5%, and it adds $900 to the year's rent ($18,900 instead of $18,000). The formula is (new rent − current rent) ÷ current rent × 100.
Enter the current rent and either the new rent or the percentage. The calculator shows the dollar and percent change, the new monthly and yearly rent, and, for California, Nevada, New York, Oregon and Washington, the last day to give written notice under that state's statute.
Free, no signup, runs in your browser. State rules checked against official sources: October 29, 2026
How to calculate a rent increase
- Dollar change: new rent − current rent. $1,575 − $1,500 = $75 a month.
- Percent change: dollar change ÷ current rent × 100. $75 ÷ $1,500 × 100 = 5%.
- New rent from a percentage: current rent × (1 + percent ÷ 100). $1,500 × 1.05 = $1,575.
- Yearly effect: monthly change × 12. $75 × 12 = $900 more a year.
The calculator rounds the new rent to the cent. When you enter a new rent amount, the percentage is worked out from the exact figures.
Worked examples
| Current rent | Increase | New rent | Monthly change | New yearly rent | Yearly change |
|---|---|---|---|---|---|
| $1,500 | 5% | $1,575.00 | +$75.00 | $18,900.00 | +$900.00 |
| $2,000 | to $2,150 (7.5%) | $2,150.00 | +$150.00 | $25,800.00 | +$1,800.00 |
| $1,200 | 10% | $1,320.00 | +$120.00 | $15,840.00 | +$1,440.00 |
| $2,400 | to $2,700 (12.5%) | $2,700.00 | +$300.00 | $32,400.00 | +$3,600.00 |
Notice deadlines for a new rent starting March 1, 2027: in California, a 7.5% increase delivered in person needs notice by January 30, 2027 (30 days), and a 12.5% increase mailed within California needs it by November 26, 2026 (90 days plus 5 for mail). In Oregon or Washington, notice is due by December 1, 2026 (90 days).
State notice periods and limits we have checked
We only list a state after checking its rule against the statute or an official state website. Other states are left out on purpose; for those, check your state and local law. Cities and counties can add their own rules, and subsidized or rent-regulated units often follow different ones.
| State | Written notice before the increase | Statewide limit | Source |
|---|---|---|---|
| California | Month-to-month or shorter: at least 30 days if the increase is 10% or less over 12 months; at least 90 days if it is more than 10%. Mailed within California adds 5 calendar days. | Covered units (Civil Code § 1947.12): no more than 5% plus the local CPI change, or 10%, whichever is lower, over 12 months. Exemptions include housing with a certificate of occupancy issued within the past 15 years. | Civil Code § 827 Civil Code § 1947.12 Code of Civil Procedure § 1013 |
| Nevada | At least 60 days before the first higher rent payment; 30 days for a periodic tenancy of less than 1 month. | Not set by this statute. Check local law. | NRS 118A.300 |
| New York | Increases of 5% or more on apartments that are not rent regulated: 30 days if the tenant has lived there under 1 year (or has a lease under 1 year), 60 days for 1 to 2 years, 90 days for 2 years or more (or a 2-year lease). | No single statewide figure. Rent-stabilized units and apartments covered by the Good Cause Eviction law follow their own rules. Check your local law. | Real Property Law § 226-c, NY Attorney General tenants’ rights guide |
| Oregon | At least 90 days (7 days for week-to-week). No increase in the first year of the tenancy, and no more than once in any 12 months. | 9.5% for 2026 and 10% for 2027 (7% plus CPI, capped at 10%). Units whose first certificate of occupancy is under 15 years old are exempt. | ORS 90.323 and 90.324 Oregon Office of Economic Analysis |
| Washington | At least 90 days (30 days for subsidized tenancies where rent is based on income). No increase in the first 12 months of the tenancy. | 9.683% for 2026 and 10% for 2027 (7% plus CPI, capped at 10%). Exemptions include units whose first certificate of occupancy was issued 12 or fewer years ago. | RCW 59.18.140 RCW 59.18.700 RCW 59.18.710 WA Department of Commerce |
Sources checked October 29, 2026. Oregon and Washington publish a new limit each year; the calculator uses the figure for the calendar year the new rent starts and asks you to check the official page for later years.
After you set the new rent
Put the increase in writing with the old rent, the new rent and the date it starts. Once the new rent is paid, give a receipt for the new amount with our free rent receipt generator. If the tenant is moving in or out partway through a month, the prorated rent calculator works out the partial-month amount. See state rent receipt requirements for states where receipts are required.
Frequently asked questions
How do I calculate a rent increase percentage?
Subtract the current rent from the new rent, divide by the current rent and multiply by 100. Going from $1,500 to $1,575 is a $75 increase, and $75 ÷ $1,500 × 100 = 5%. Over a year that is $900 more ($18,900 instead of $18,000).
How much notice do I have to give before raising the rent?
It depends on the state and sometimes the city. Of the states we have checked: California needs at least 30 days for an increase of 10% or less over 12 months and 90 days above that; Nevada needs 60 days; Oregon and Washington need 90 days; New York needs 30, 60 or 90 days for increases of 5% or more on unregulated apartments, depending on how long the tenant has lived there. For other states, check your state and local law.
Is there a limit on how much I can raise the rent?
Some states set one for covered units. California limits increases to 5% plus the local CPI change, or 10%, whichever is lower, over 12 months. Oregon's limit is 9.5% for 2026 and 10% for 2027, and Washington's is 9.683% for 2026 and 10% for 2027. Each state exempts some units, such as newer buildings, and many cities have their own rules.
How is the notice deadline counted?
The calculator counts back the required number of days from the date the new rent starts. For a March 1, 2027 start, 30 days back is January 30, 2027 and 90 days back is December 1, 2026. In California, mailing the notice within the state adds 5 calendar days. Giving notice a few days earlier than the minimum leaves room for delivery.
Can I raise the rent in the middle of a lease?
Usually only if the lease allows it. In Washington, RCW 59.18.140 says an increase can't take effect before the end of the rental agreement's term. Check your lease before setting the start date.
Is anything I type sent to a server?
No. The math runs in your browser, nothing you type is stored, and the receipt button only puts the new rent amount in the address bar.
This calculator does arithmetic and points to the state rules we have checked. It isn't legal advice. Your lease and your state and local law decide how much notice you must give and how much rent can go up.