Rent Increase

Finding a New Rent From a Percentage, or a Percentage From a New Rent

A rent increase is the difference between what you’re currently paying and a new, higher (or lower) rent amount, expressed both as a dollar figure and a percentage. Enter your current rent plus either the percentage increase or the new rent amount, and this calculator finds the other one for you, along with the monthly and yearly dollar impact.

This is a “solve for whichever you know” calculator — if your landlord tells you rent is going up 5%, use Percentage mode. If they tell you the new amount directly, use New Rent Amount mode. Both modes always agree with each other for the same underlying change.

The Formula

• From a percentage: New Rent = Current Rent × (1 + Increase % ÷ 100).
• From a new amount: Increase % = (New Rent − Current Rent) ÷ Current Rent × 100.
• Monthly increase = New Rent − Current Rent.
• Annual increase = Monthly Increase × 12.

Worked Example

$1,500 current rent with a 5% increase:

1. New rent: $1,575 ($1,500 × 1.05).
2. Monthly increase: $75.
3. Annual increase: $900.

The same result works in reverse — entering a new rent of $1,575 in New Rent Amount mode correctly finds a 5% increase.

Key Factors to Consider

• Notice-period requirements for a rent increase vary significantly by jurisdiction. Many places legally require a landlord to give a minimum amount of advance written notice (commonly 30-90 days depending on the size of the increase and local law) before a rent increase takes effect — this calculator computes the dollar and percentage impact, but the timing rules around when an increase can legally take effect are a separate, locally-determined matter.
• Comparing a proposed increase against local market rent gives useful context beyond the raw percentage. A 5% increase on a unit that was already below the going rate for comparable local units is a different situation than the same 5% increase pushing a unit above market rate — checking comparable listings nearby helps judge whether an increase is reasonable.
• A rent increase compounds year over year, the same way any recurring percentage change does. A modest-looking 3% annual increase, repeated consistently over several years, adds up to a meaningfully larger total increase than a single year’s math alone suggests — worth projecting forward a few years when comparing a long-term lease renewal against a potential move.
• Renewing a lease and negotiating rent are two separate, related decisions. Some tenants successfully negotiate a smaller increase than initially proposed, especially with a strong rental history or in a softer local rental market — the calculator shows the math for whatever number is agreed to, but the number itself isn’t necessarily fixed before a conversation happens.

Common Mistakes

• Confusing a dollar increase with a percentage increase. A $75 increase on $1,500 rent is 5%, but that same $75 increase would be a much bigger percentage on a lower starting rent — always check which figure your landlord or lease actually quoted.
• Assuming every location has the same rules. Rent control and rent stabilization laws — where they exist — vary enormously by city and state, and many places have no cap on annual increases at all. This calculator only does the math; check your local landlord-tenant laws for anything legally binding.
• Forgetting the annual impact. A monthly increase that seems small can add up meaningfully over a full year, which matters when comparing against a raise or reworking a Budget Calculator.

Useful to Know

• Want to see how a higher rent fits into your overall monthly finances? Budget Calculator helps rework a full monthly budget around the new number.
• Splitting rent with roommates and want to see how an increase divides between everyone? Rent Split Calculator divides a rent amount fairly across multiple people.
• Weighing whether to renew at the new rent or look at buying instead? Rent vs. Buy Calculator compares the long-term financial picture of renting versus buying.