Prorated Rent Calculator
Figure out the exact rent for a partial move-in month. Enter the rent, the move-in date, and the calculation method — get the daily rate, days occupied, and the precise amount due in seconds.
The exact rent for a partial month
Set the rent and move-in date. The results update instantly — no waiting, no email gate.
Lease Details
The day the tenant takes possession.
Actual days uses the real days in the month. Banker's year assumes 30 days — common in commercial leases.
For 16 days of occupancy in November 2026 — move-in day 15 through month end.
November 2026 — Occupancy Timeline
When to use which method
Actual days is the standard for residential leases — divide monthly rent by the real number of days in that month. Banker's year (30 days) is simpler and common in commercial leases, but it slightly over-prorates in 31-day months and under-prorates in February. Put the agreed method in the lease to avoid disputes. The next full rent payment is due December 1, 2026.
Want rent collection this clean, every month?
Prorated move-ins are easy to get wrong. Our rent collection handles proration, late fees, and direct deposit automatically — so every tenant pays the right amount on time, without you doing the math.
Disclaimer: This calculator produces a prorated rent estimate based on the inputs and method you select. The actual amount due is governed by your lease — always confirm the proration method (actual days vs. banker's year) and billing date in the lease agreement before collecting. This is not legal or financial advice.
How prorated rent works — and how to get it right
When a tenant moves in mid-month, they don't owe a full month's rent — they owe a prorated amount for the days they actually occupy the unit. It sounds simple, but landlords and tenants disagree about it constantly because there's more than one way to calculate it. This guide walks through the two standard methods so the number on the lease matches the number in everyone's head.
Method 1: Actual days in the month
The standard for residential leases. You divide the monthly rent by the real number of days in that month (31 in January, 28 or 29 in February, etc.) to get a daily rate, then multiply by the days the tenant occupies. A $1,900 rent in a 31-day month gives a daily rate of about $61.29; the same rent in February gives about $67.86. This is the most accurate method and the one most residential leases use.
Method 2: Banker's year (30 days)
Simpler and common in commercial leases. You assume every month has 30 days, so the daily rate is always monthly rent ÷ 30. A $1,900 rent gives a flat $63.33/day regardless of the month. It's easier to calculate but slightly over-prorates in 31-day months and under-prorates in February. If your lease specifies this method, use it — consistency matters more than the small difference.
Which days count — and the move-in day question
The most common dispute isn't the method, it's whether the move-in day itself counts. The standard convention is that the tenant pays for the day they take possession — so a move-in on the 15th of a 30-day month means 16 days of prorated rent (the 15th through the 30th). This calculator uses that convention. Put it in the lease so there's no argument at move-in.
Next step: rent collection that handles this for you
Proration is easy to get wrong and tedious to track. Our rent collection service calculates prorated move-ins, applies late fees automatically, and deposits rent directly to you — so every tenant pays the right amount on time without you doing the math. For a rent number backed by real Metro Detroit comparables, request a free rental analysis.
Prorated rent — common questions
Straight answers on the methods, the move-in day, and how to use the result.
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