Prorated Rent Calculator
Compare actual-day, 30-day and annual rent proration. Inputs stay in your browser.
Compare four common rent-proration methods; the selected lease method is highlighted.
Context matters.
- The lease's billing method and local law determine the amount actually owed.
Sources & scope
The calculation guide and this source trail show what the result means, where the rule came from and when it was last reviewed. This is source-and-calculation QA, not a claim of medical, legal, tax or other professional review; time-sensitive decisions still belong with the linked authority.
A visible path from input to answer.
Compare actual-day, 30-day and annual rent proration. The page keeps the calculation scope and its limits beside the result so the output can be checked, copied or revisited.
- Read the record. The calculator uses Monthly rent (USD), Proration start, Proration end, Lease calculation method and Days in custom lease period supplied in the form.
- Apply the scope. It applies the User-provided values — verify local or contractual assumptions reference and the explicit date, unit and counting conventions shown in the result.
- Expose the checkpoints. Intermediate rows, warnings and timeline events stay visible; the emphasized row identifies the primary checkpoint when one exists.
Compare four common rent-proration methods; the selected lease method is highlighted.
- Actual days in month$154.84
Calculation purpose: Compare actual-day, 30-day and annual rent proration. This is a general planning reference; local conditions, product instructions or personal records can override the estimate.
Calendar inputs use plain year-month-day semantics. Leap days, month ends, date-pair order and unsupported dates are checked before the result is shown.
Rule set 1.1.0 · Last reviewed 2026-08-20 · Next review due 2027-02-20. The source panel below contains the linked evidence.
What to know before using the result.
Are both the start and end dates billed?
This calculator counts both dates. Change the end date if your lease uses an exclusive move-out date.
Which rent-proration method should I use?
Use the method stated in your lease. Actual-day, 30-day, annual and custom-period results are shown together for comparison.
Does this determine what a tenant legally owes?
No. The lease and applicable local law control the final amount.