How to Use
- 1.
Enter the current monthly rent and edit the proposed rent, increase amount, or increase percentage.
- 2.
Choose a state and, where available, a verified 2026 regional profile or enter a custom local cap and notice period.
- 3.
Add monthly income and expenses to compare current and proposed affordability and budget impact.
- 4.
Enter CPI, market rent, notice date, and lease renewal date for comparison and timing estimates.
- 5.
Review 3, 5, and 10-year projections plus tenant and landlord planning summaries.
- 6.
Copy, share, save, print, or download the calendar reminder, then verify local rules before acting.
Features
Synchronized new rent, increase amount, and increase percentage
Monthly and annual difference
Reverse rent increase calculations
Maximum affordable rent benchmark
All 50 states plus DC
Verified selected 2026 regional planning profiles
Custom local cap and notice period
Planning-cap status without unsupported legal verdicts
Notice effective date
Lease renewal notice tracker
CPI comparison
Local market-rent comparison
3, 5, and 10-year compound projections
Current and proposed rent-to-income ratios
Monthly budget impact
Neutral counter-offer starting point
Multi-unit annual rent roll
NOI and simple ROI impact
Currency selector
Copy and browser share
Local history
Print or save as PDF
iCalendar reminder download
Responsive dark-mode interface
Official source links and legal disclaimer
Frequently Asked Questions
How do I calculate a rent increase percentage?+
Subtract current rent from new rent, divide the difference by current rent, and multiply by 100. This calculator performs the calculation instantly.
How do I calculate new rent from an increase percentage?+
Multiply current rent by one plus the percentage divided by 100. Enter the percentage here and the synchronized new-rent field updates automatically.
Can I enter an increase amount instead of a percentage?+
Yes. Enter a dollar increase and the calculator updates both proposed rent and percentage.
Does this calculator determine whether a rent increase is legal?+
No. It compares the proposal with a selected planning cap. Coverage, exemptions, property type, lease terms, notice, and local law must be verified.
Why is there no automatic cap for every state?+
Many rules are local or apply only to covered properties. Showing no cap is more accurate than inventing a statewide limit where a simple universal rule is unavailable.
What does the 30% affordability benchmark mean?+
It is a common housing-cost planning reference, not a universal legal, lending, or benefit eligibility rule. Household needs and included housing costs differ.
How does the notice period calculator work?+
It adds the entered notice days to the notice date and also subtracts them from the lease renewal date. Delivery and effective-date rules still need local verification.
How are future rent projections calculated?+
The tool compounds the current increase percentage once per year. It is a scenario, not a forecast of what a landlord may charge or what law may allow.
How does the inflation comparison work?+
It compares the entered increase percentage with the CPI assumption you provide. It does not fetch live CPI data.
What is the counter-offer estimate?+
It is a neutral discussion starting point based on entered inflation, market rent, and any selected cap. It is not legal or negotiation advice.
Can landlords calculate multiple units?+
Yes. Enter occupied units and average rent to estimate annual rent roll, additional revenue, NOI, and a simple yield change.
Can I save or export a calculation?+
Yes. Save it locally, copy a summary, share a parameterized link, print or save as PDF, or download an iCalendar notice reminder.
About this tool
Free Rent Increase Calculator
Use this free Rent Increase Calculator to convert a proposed monthly rent into an increase amount and percentage, or enter a percentage to calculate the new rent. It also shows the annual budget impact, affordability ratio, notice dates, inflation comparison, and future rent projections.
How the Rent Increase Calculator Works
Enter the current monthly rent, then edit the proposed rent, increase amount, or increase percentage. All three values stay synchronized. The calculator displays the monthly difference, annual difference, and the percentage change in real time.
Calculate Rent Increase Percentage and New Rent
Rent increase percentage equals the monthly increase divided by the current rent, multiplied by 100. If the current rent is $1,800 and the proposed rent is $1,890, the increase is $90 or 5%. Reverse calculation lets tenants and landlords begin with either a desired percentage or a target rent.
Monthly and Annual Budget Impact
A small monthly change can become a meaningful annual expense. The results show old and new annual rent, extra monthly cost, extra annual cost, and the remaining household budget after other entered expenses.
Maximum Affordable Rent
Enter gross monthly household income and choose a planning benchmark. The commonly discussed 30% housing-cost benchmark is useful for an initial comparison, but it is not a universal eligibility rule and does not include every household expense. The tool shows both current and proposed rent as a share of income.
Rent Control and Local Increase Limits
Rent control depends on jurisdiction, property, construction date, tenancy, exemptions, lease terms, and notice procedure. Selected 2026 profiles are included for California areas, Oregon, Washington, the District of Columbia, and New York City rent-stabilized leases. A custom cap and notice period can be entered for any location. The result says whether an increase is within or above the selected planning cap; it does not issue a legal verdict.
Rent Increase Notice Period and Lease Renewal
Choose a notice date and notice period to estimate when an increase could take effect. Add a lease renewal date to see the latest planning date for sending notice. Always confirm delivery method, lease requirements, local forms, and current law.
Compare Rent Increase with Inflation and Market Rent
Enter a CPI assumption and a local comparable-rent estimate. The calculator compares the proposed percentage with inflation and shows how the new rent differs from the entered market figure. These user-entered assumptions are planning aids, not verified market data.
Multi-Year Rent Projection
The 3, 5, and 10-year projections compound the entered annual increase rate. A simple chart makes long-term rent growth easier to see. Actual future rent can differ because increases may change, stop, or be restricted.
Tenant Affordability and Counter-Offer Planning
The negotiation helper produces a neutral starting point from the lower of the proposed rent, entered market rent, and an inflation-or-cap-based increase. It is not a valuation or a guarantee that either party will accept the amount.
Landlord Rent Roll and ROI Impact
Enter occupied units, average rent, property value, and annual operating expenses to estimate current and proposed annual rent roll, added revenue, net operating income, and the change in simple property-level yield. This section does not replace accounting or investment analysis.
Save, Share, Print, and Calendar Reminder
Save calculations in local browser storage, copy a summary, share a URL with the main inputs, print or save the page as PDF, and download an iCalendar reminder for the lease notice date. Saved information stays on the current device unless you share or export it.
Verify Local Rent Rules
Rental laws and published limits change. Before sending, accepting, or challenging an increase, verify property coverage, exemptions, allowable costs, notice wording, delivery, and effective dates with the relevant housing agency or a qualified local professional.
Compare longer-term housing costs with the Rent vs Buy Calculator, measure the purchasing-power context with the Inflation Calculator, or double-check a proposed change using the Percentage Calculator.