Rent Increase Calculator
Enter the current rent and the increase you have in mind — as a percent or a dollar amount — and this calculator gives you the new rent, the increase expressed both ways, and the annualized rate if it has been more or less than a year since the last change. The math is shown so you can include it in a rent increase letter.
New rent: $1,560.00
The math
- Increase: $1,500.00 × 4% = $60.00 per month
- New rent: $1,500.00 + $60.00 = $1,560.00
- Annualized rate: 4% × 12 ÷ 12 months = 4% per year (a 12-month gap, so the annualized rate equals the increase itself)
Why the annualized number matters
A $100 increase means something different after 8 months than after 2 years. Annualizing puts increases on a common yardstick: it scales the percent change to a 12-month rate. If you raised rent 4% after 24 months, that is about 2% per year — useful context when a tenant asks how the increase compares to inflation, and useful to you when deciding whether small regular increases beat one big catch-up. This calculator uses the simple method (percent change × 12 ÷ months since last increase), which is the number most people mean in this context.
Before you send the increase
- Check your required notice period. Most states require written notice — 30 days is common for month-to-month tenancies, 60 or 90 days in some places or for larger increases. Mid-lease increases are generally not allowed unless the lease provides for them.
- Check for rent regulation. Some states and cities cap how much rent can rise per year. If your property is in a rent-controlled or rent-stabilized jurisdiction, the cap controls, not this calculator.
- Put it in writing. A dated letter with the old rent, new rent, and effective date. We have a free lease renewal letter you can adapt.
Not legal advice. This calculator does arithmetic only. It does not know your state's notice requirements or whether your unit is covered by any rent cap or stabilization rule. Check your local law before sending an increase notice.
Common questions
How much notice do I have to give for a rent increase?
It varies by state and by tenancy type. For month-to-month tenancies, 30 days' written notice is a common requirement, and some states require 60 or 90 days, sometimes tied to the size of the increase. For a fixed-term lease, the rent generally cannot change until renewal unless the lease says otherwise. Look up your state's rule before you send anything.
Is there a limit on how much I can raise rent?
In most US markets there is no fixed cap for ordinary rentals, but a growing number of states and cities do cap annual increases, and rent-stabilized units have their own rules. There are also broad limits everywhere: an increase used to retaliate or discriminate is illegal. Confirm whether any cap applies to your property.
What's a reasonable rent increase?
There is no universal number, and we won't invent one. The honest inputs are: what comparable units near you rent for, your actual cost changes (taxes, insurance, maintenance), and what losing a good tenant to turnover would cost you — vacancy, cleaning, and re-listing often exceed a year's worth of a modest increase. Run the comparison for your own numbers.
Percent increase or flat dollar increase — does it matter?
The tenant pays the same either way; it is about clarity. Dollar amounts are concrete ('rent goes from $1,500 to $1,560'). Percentages make comparisons easier. This calculator gives you both, so state both in your letter.