Prorated Rent Calculator

Calculate move-in rent proration using actual days, banker 30-day, and annualized methods side by side.

Inputs

Enter the monthly rent and move-in date; the calculator counts occupied days through the end of the month.

Monthly rent Base monthly rent before proration. Move-in date Occupied days are counted inclusively from this date.

Days in month Enter 28, 29, 30, or 31 based on the lease month. Lease line method Highlights the method used for the lease line item.

Results

Each method uses the same occupied-day count and applies the specified proration formula.

Monthly rent

$0.00

Move-in date

Days in month

Days occupied

Method	Formula	Daily rate	Days	Prorated amount
Enter valid inputs to calculate prorated rent.

Lease line item

Enter valid inputs to generate a lease line item.

Standard/category reference: Finance & Supply Chain. The methods shown are actual days, banker 30-day, and annualized proration.

Self-tests

Run golden checks against the core proration functions.

Self-tests not run.

About the Prorated Rent Calculator

Property managers, landlords, tenants, and leasing teams use a prorated rent calculator to compare partial-month rent under actual-day, 30-day, and annualized methods. Enter monthly rent, move-in or move-out date, and billing period to see the daily rate and amount due. It makes lease conversations clearer when occupancy starts or ends mid-cycle.

Frequently asked questions

Which prorated rent method is legally required?

The lease and local law control. Some leases specify a 30-day month, some use actual calendar days, and some jurisdictions or subsidized housing programs have their own rules.

How is actual-day prorated rent calculated?

Actual-day proration divides monthly rent by the number of days in that specific month, then multiplies by the occupied days. February, 30-day months, and 31-day months therefore produce different daily rates.

How does the 30-day method work?

The 30-day method divides monthly rent by 30 regardless of the calendar month. It is simple and common in leases, but it can differ from actual-day proration in February or 31-day months.

Should utilities and parking be prorated too?

Only if the lease, utility billing arrangement, or property policy says they are prorated. Separate recurring charges may use different daily-rate rules than base rent.

Is move-in day counted as an occupied day?

Usually yes if the tenant has possession that day, but the lease should decide. For move-outs, the answer may depend on surrender time, keys, and local practice.