Contract Date Calculator

Effective date, term, and notice period — get the end date and the non-renewal deadline, plus a calendar/business-day deadline counter for everything else.

Free — no signup Runs in your browser Pairs with the Service Agreement
Worked example

A 12-month contract effective April 1, mapped out

Example: effective Apr 1, 2027 · 12 months · 60-day notice

A 12-month agreement effective April 1, 2027 runs through the day before its anniversary, and the non-renewal window closes 60 days before that:

Term ends   = Apr 1, 2027 + 12 months − 1 day = Mar 31, 2028
Notice due  = Mar 31, 2028 − 60 days = Jan 31, 2028

Auto-renewal clauses quietly renew for another full term if nobody speaks up by the notice date — which is why January 31, not March 31, is the date that matters. For shorter obligations inside the contract (“net 10,” “within 5 business days”), use the deadline counter: 10 business days from April 1, 2027 lands on April 15, skipping both weekends.

FAQ

Contract date questions

Calendar days count every day including weekends and holidays; business days count Monday through Friday only. Contracts use both — and a “10-day” deadline differs by nearly a week depending on which was meant. If a contract doesn’t specify, calendar days is the usual default reading, but the fix is drafting it explicitly.
The business-day counter skips weekends but not holidays, because holiday treatment varies by contract (many define “business day” as excluding federal holidays, some don’t address it). If a computed deadline lands near a holiday, check how your contract defines the term.
An “evergreen” clause renews the contract for another term automatically unless a party gives written non-renewal notice by a stated deadline — typically 30–90 days before term end. Several states now require businesses to remind consumers before auto-renewal, but B2B contracts mostly enforce the clause as written. Calendar the notice date when you sign, not when you remember.
On its effective date, which isn’t always the signing date — contracts can be signed today but effective on a future date, or (carefully) made retroactively effective. This calculator counts from the effective date, so use that date rather than the signature date if they differ.

This calculator provides general estimates for planning purposes and is not legal, tax, or financial advice. Auto-renewal notice requirements vary by state, especially for consumer contracts.

The dates are locked.
Now build the contract around them.

BizDocs writes complete service agreements with the term, renewal, and notice mechanics spelled out — so no deadline sneaks up on either side.

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