Rent Increase Calculator
Calculate the monthly, annual, and percentage change from current to proposed rent, then compare entered rent and utilities with gross household income.
Monthly rent increase
+$135.00per month
+$1,620.00 over 12 months
- Percent change
- +7.5%
- Proposed rent
- $1,935.00
- Housing-cost share
- 32.8%
Rent comparison
- Current annual rent
- $21,600.00
- Proposed annual rent
- $23,220.00
- Annual change
- +$1,620.00
- Current entered housing-cost share
- 30.8%
- Proposed entered housing-cost share
- 32.8%
- Share change
- +2.1 points
- Income after proposed rent + utilities
- $4,365.00
HUD context checked 2026-08-21
HUD defines housing cost burden using monthly housing costs including utilities. This ratio is context, not a legal rent cap or eligibility decision.
HUD CHAS definitionsWhat this calculator assumes
- The comparison uses the current and proposed rent you enter and annualizes the difference over 12 months.
- Utilities are held constant between the two scenarios.
- Housing-cost share is shown only when gross monthly income is greater than zero.
- Legality, notice, lease terms, local caps, tenant protections, and assistance eligibility are outside scope.
Formulas, assumptions, and rounding are documented in our calculator methodology.
Built and maintained by Will Henschell, Data Scientist. Editorial policy.
The Rent Increase Formula
Monthly change equals proposed rent minus current rent. Percentage change equals that monthly change divided by current rent, multiplied by 100. Annual change multiplies the monthly difference by twelve. The calculator allows a negative change so it can compare a concession, negotiated reduction, or lower renewal offer as well as an increase.
Compare the Change in Dollars and Percent
A dollar change answers the immediate budgeting question, while percentage change makes differently priced homes easier to compare. A $100 increase is 10% on $1,000 rent but 5% on $2,000 rent. Review both numbers and the full annual effect before deciding how much room the proposal leaves for utilities, transportation, food, savings, and other obligations.
Housing-Cost Share Uses Your Entered Utilities
HUD's CHAS definition uses monthly housing costs including utilities relative to monthly income. This calculator therefore adds one utilities input to both current and proposed rent before calculating the ratios. If utilities change too, run separate scenarios. Enter zero income to omit the ratios when you want only rent-change arithmetic.
Arithmetic Is Not a Legal Rent-Cap Test
A percentage result does not establish whether a proposal is permitted. Rules can depend on location, building type, lease dates, subsidy status, exemptions, required notice, and emergency or local ordinances. Keep the proposed notice and lease available, confirm the effective date, and use a current government or qualified local source for legal questions.
Official Source Review — August 21, 2026
The affordability context was rechecked against current U.S. Department of Housing and Urban Development CHAS definitions, HUD's 2025 affordability overview, and the Census gross-rent definition. Those sources include utilities in renter housing costs. The calculator does not convert the research context into a legal cap, assistance determination, or claim that one ratio fits every household.
Frequently Asked Questions
- Subtract current monthly rent from proposed monthly rent, divide that change by current rent, and multiply by 100. For example, a change from $1,800 to $1,935 is $135 divided by $1,800, or 7.5%. The calculator keeps full precision before formatting the result.
- Multiply the monthly change by twelve. A $135 monthly increase adds $1,620 over a full twelve-month period. This comparison assumes the proposed amount applies for all twelve months; a midyear effective date requires multiplying by the actual number of affected months.
- Yes. When proposed rent is lower than current rent, the monthly, annual, and percentage changes are negative. A decrease is treated as a valid comparison rather than an error.
- It is entered monthly rent plus entered utilities divided by entered gross monthly household income. HUD defines housing cost burden using monthly housing costs including utilities, with more than 30% considered burdened and more than 50% severely burdened. Those thresholds provide context, not a personalized verdict or eligibility decision.
- No. Rent caps, notice periods, renewal rules, exemptions, subsidy rules, and tenant protections depend on the lease, property, program, jurisdiction, and current law. Use the calculator for arithmetic, then check the governing documents and authority separately.