Prorated rent calculator
Prorated Rent Calculator
Calculate partial-month rent when someone moves in, moves out, or pays for only part of a rental period.
Based on 10 days out of 30 days.
Full rent divided by days in the rent period.
Prorated rent = monthly rent / days in period x days owed.
How this calculator works
Proration splits the full rent across the days in the rental period, then charges only the days owed. That can happen at move-in, move-out, lease changes, roommate changes, or when a landlord charges for a partial first month.
The safest approach is to match the lease or invoice. Some leases use the exact number of days in the month. Others use a fixed 30-day period. This calculator lets you enter either method.
What this result does not include
The result covers base rent only. Utilities, deposits, parking, late fees, local rules, and lease-specific rounding may need to be handled separately.
Worked examples
Moving in mid-month
If rent is $1,800 and the tenant owes 10 days out of a 30-day period, the prorated amount is $600.
Comparing calendar-day and 30-day methods
A 10-day charge in February can differ from a 10-day charge in a 31-day month. Check which day count your lease uses.