Rent Renewal Calculator
Work out a new rent from a percentage increase, a flat increase, or both.
Property math you can explain to anyone who asks.
Free calculators for everyday property management questions. Enter your numbers, get the result, and copy every step of the math into an email or ledger note.
- Monthly rent
- $1,875.00
- Move-in date
- July 16, 2026
- Days billed
- 16 of 31
- Calculation
- $1,875.00 × 16 ÷ 31
First month's rent $967.74
Try the move-in rent proration calculator- Monthly rent
- $1,875.00
- Last day of rent
- February 27, 2026
- Days billed
- 27 of 28
- Calculation
- $1,875.00 × 27 ÷ 28
Last month's rent $1,808.04
Try the move-out rent proration calculator- Current rent
- $1,800.00
- New rent
- $1,875.00
- July 1–15 at current rent
- $870.97
- July 16–31 at new rent
- $967.74
July rent $1,838.71
Try the mid-month rent change calculator- Current rent
- $1,800.00
- 3% increase
- $54.00
- Fixed increase
- $25.00
- Effective increase
- 4.39%
New rent $1,879.00
Try the rent renewal calculatorPick a calculator
See all calculatorsMove-In Rent Proration Calculator
Prorate the first month's rent from the move-in date to the end of the month.
Move-Out Rent Proration Calculator
Prorate the last month's rent from the 1st through the move-out date.
Mid-Month Rent Change Calculator
Split one month's rent between the current rent and a new rent that starts mid-month.
Every step shown
Each result lists your inputs and the formula, so you can check it or pass it along.
Exact to the cent
Amounts stay exact until the last step, then round once. No drifting pennies.
Stays in your browser
No account, no tracking. What you enter is never sent anywhere. Privacy details