Lease date calculator

Lease Date Calculator

Enter a lease start date and a whole-number term in calendar months to calculate the matching lease end date.

Lease start date

Term in calendar months

Enter a whole number from 1 through 120. Enter 12 for a 12-month lease.

Calculated lease end

July 18, 2027

The result is the calendar day immediately before the same numbered day after the entered term. The written agreement controls the contractual end date.

Lease start

2026-07-19

Term

12 months

Calculated end

2027-07-18

How this calculator works

The calculator uses calendar months. When the original day does not exist in the target month, the end date is clamped to that target month’s final day.

Calendar-month and month-end assumptions

The written lease or agreement controls the contractual end date. Month-end wording and local legal rules may use a different convention, so treat this result as a planning calculation rather than legal interpretation.

Worked examples

Month-end start

A one-month term starting 2025-01-31 ends 2025-02-28 because February does not have a 31st day.

12-month term

A 12-month term starting 2025-06-01 ends 2026-05-31 under this calendar-month convention.

Related calculators and guides

Rent schedule calculatorGenerate payment rows across a lease term.Rent due date calculatorFind the next or recurring rent due date.Calculation methodologyRead how calendar-month date handling is implemented.

Frequently Asked Questions

How does the calculator handle month-end starts?

It uses calendar months. If the original numbered day does not exist in the target month, the result uses that month’s final calendar day.

Can I calculate a 12-month lease?

Yes. Enter 12 as the term in calendar months. Under this convention, a term starting June 1 ends May 31 the next year.

Does this determine the legal lease end date?

No. It applies the stated calendar-month convention for planning. The written agreement and applicable local rules control the contractual date.