Rent Increase Calculator Formula

Understand the math behind the rent increase calculator. Each variable explained with a worked example.

Use the Rent Increase Calculator

Formulas Used

New Monthly Rent

new_monthly_rent = new_rent

Monthly Increase Amount

monthly_increase = dollar_increase

Annual Revenue Increase

annual_increase = dollar_increase * 12

Rent After Projection Period

future_rent = rent_after_years

Total Growth Over Period

total_growth_pct = current_rent > 0 ? ((rent_after_years - current_rent) / current_rent) * 100 : 0

Variables

VariableDescriptionDefault
current_rentCurrent Monthly Rent(USD)1800
increase_pctAnnual Increase Rate(%)4
projection_yearsYears to Project5
dollar_increaseDerived value= current_rent * increase_pct / 100calculated
new_rentDerived value= current_rent + dollar_increasecalculated
rent_after_yearsDerived value= current_rent * pow(1 + increase_pct / 100, projection_years)calculated

How It Works

Calculating Rent Increases

Rent increases help landlords keep pace with inflation, rising property taxes, and increasing maintenance costs. Most increases are applied as a percentage of the current rent.

Formula

New Rent = Current Rent x (1 + Increase Percentage / 100)

For multi-year projections: Future Rent = Current Rent x (1 + Annual Rate)^Years

Determining the Right Increase

  • Check local rent control laws for caps on annual increases
  • Review comparable rents in your area to stay competitive
  • Consider tenant retention costs versus the increase amount
  • Factor in your own cost increases (taxes, insurance, maintenance)

    • Timing Considerations

  • Most increases are applied at lease renewal
  • Give proper notice as required by law (usually 30-60 days)
  • Consider market conditions when timing increases

    • Worked Example

    Current rent is $1,800/month with a planned 4% annual increase, projected over 5 years.

    current_rent = 1800increase_pct = 4projection_years = 5
    1. 01Dollar increase: $1,800 x 4% = $72
    2. 02New monthly rent: $1,800 + $72 = $1,872
    3. 03Annual revenue increase: $72 x 12 = $864
    4. 04Rent after 5 years: $1,800 x (1.04)^5 = $2,190
    5. 05Total growth: ($2,190 - $1,800) / $1,800 = 21.7%

    Ready to run the numbers?

    Open Rent Increase Calculator