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Contract Expiry Date Calculator

Work out contract expiry date instantly with clear inputs, formula shown and shareable results.

About Contract Expiry Date Calculator

A 24 month contract from 15 January 2026 expires on 15 January 2028, a term of 730 days. With 90 days notice required, the decision deadline is 17 October 2027 - and missing it usually triggers automatic renewal, which is the trap in evergreen contracts.

Formulas

Expiry date

expiry = start date with the month advanced by the term

Notice deadline

deadline = expiry - notice days

Worked example

With the default values below, Contract Expiry Date Calculator returns Contract Term In Days of 730. Change any input above and every figure here is recalculated in your browser.

Inputs used

Contract start
2026-01-15
Contract termminimum 1 months
24 months
Notice required before expiryminimum 0 days
90 days

Results

Contract Term In Days
730 days
Expiry Date
2028-01-15
Deadline For Serving Notice
2027-10-17
Term In Months
24

Step by step

  1. 1Values used
  2. 2Expiry date
  3. 3Notice deadline
  4. 4Contract Term In Days= 730 days
  5. 5Expiry Date= 2028-01-15
  6. 6Deadline For Serving Notice= 2027-10-17
  7. 7Term In Months= 24

Assumptions and limits

  • The result is derived only from the 3 inputs listed above. Anything not among them is not part of the calculation.
  • In particular, this calculator does not take inflation, tax, fees or charges or compounding frequency into account.
  • Figures are rounded for display to whole numbers, so totals built from several rounded parts can differ slightly from the unrounded arithmetic.

How these calculators are built and tested is described on the Methodology page. If a figure looks wrong, please report it.

Frequently Asked Questions

What happens if I miss the notice deadline?

Most contracts with an evergreen clause renew automatically for a further term. Diarising the deadline rather than the expiry is essential.

How are month-end starts handled?

A 31 January start on a one month term is conventionally 28 or 29 February. Contracts should state the convention explicitly.

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