Effective date or signing date? They're not the same
A contract can start on a different day from the one it's signed. That's normal, as long as the start is written into the contract and the date beside each signature is the day that person really signed. Here's how the two dates fit together, with examples.
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Before you sign, find both dates
Thirty seconds of reading saves a dispute about when the contract started.
1
Find the start
Look at the opening paragraph and the term clause: “effective as of”, “commencing on”, “from”.
2
Sign with today's date
Whatever the start date says, the date by your signature is the day you sign.
3
Keep the signed copy
Once everyone has signed, the final PDF records both the start and every signing date.
Updated 28 September 2026 · Written by Joe Farwick, who runs this site
What the terms mean
Cornell's Legal Information Institute defines the effective date as the date on which a statute, contract or other legally binding instrument takes effect and becomes operative and enforceable, adding that it may or may not be the same as the signing date. The signing date, sometimes called the execution date, is simply when a party signs.
Without an effective date in the text, the natural starting point is signature. Careful drafters spell it out anyway: a model clause from Ken Adams says the agreement becomes effective when all parties have signed it, and that the date of the last signature is the date of the agreement.
Three common situations
Work started first. A consultant begins on 1 March, but the contract isn't signed until 10 March. The honest way to handle this is to sign on 10 March, date the signatures 10 March, and say in the contract that it covers the services provided since 1 March.
The start is in the future. A lease signed on 12 May runs from 1 July. The signatures are dated in May; the term clause says the tenancy begins on 1 July. Nothing about the signature dates needs to change.
Signatures weeks apart. One party signs on 3 June, the other on 17 June. Each dates their own signature, and if the contract ties effectiveness to the last signature, 17 June is the date that counts.
Say what actually starts
Adams, author of A Manual of Style for Contract Drafting, is sceptical of the defined term Effective Date: drafters use it for several different dates, and in some of those uses it misleads. In an employment agreement, for instance, the contract is effective once signed; what starts later is the obligation to work and to pay. He suggests naming that later day for what it is, such as a Start Date.
The same goes for past periods. Rather than defining an Effective Date of 1 January so that earlier sales count, he suggests saying directly that sales from 1 January are included. When you read a draft, that's a useful test: if a clause mentions an effective date, ask what exactly it switches on.
“As of” and “dated for reference”
Some contracts put a date in the opening line that isn't the day anyone signed: “This Agreement is made as of 1 March 2026.” Adams found “dated for reference” used mainly in Canadian contracts for the same purpose. At least these phrases signal openly that the date is not the signing date.
Even so, Adams advises against building a make-believe timeline. The contract is effective when it's signed whatever date the parties choose to print, the real timeline is what counts in a dispute, and invented dates can create problems outside the contract, as backdating scandals involving stock options and sales contracts showed. His recommendation is to use the signing date, or something close to it, and describe any earlier performance in the text.
Signing in counterparts and by PDF
When parties sign separate copies, or each signs the same PDF in turn, the signature dates will differ. That's fine. Make sure every signature page carries its own date, and that the final PDF everyone keeps includes all the signed pages. If you sign a PDF that someone else has already signed and dated, add only your own signature and date; don't touch theirs.
Date questions
Can the effective date be before the signing date?+
Yes, if the parties agree and write it into the contract. The signatures are still dated on the days they're made.
What if the contract has no effective date?+
It generally takes effect when it's signed, which in practice often means when the last party signs. Check for a clause that says so.
Is this legal advice?+
No. It explains common practice. For a contract with a lot riding on its dates, ask a lawyer to look at the wording.
What does it cost to sign and date a contract here?+
Placing your signature and the signing date on the contract PDF, and checking the result, costs nothing. Only the download of the signed contract is paid, through a monthly plan at €2.99 or a yearly one at €24.99; either can be cancelled and keeps working to the end of its paid term.
Which date does what
Signing (execution) date
When a party signs. A contract signed on different days has several; each is a fact.
Effective date
When the contract takes effect and becomes enforceable. The parties agree on it.
Start or commencement date
When performance begins, such as the first day of work or a tenancy. Often later than signing.
“As of” date
A date in the opening line that isn't the signing day, flagged with “as of” or “dated for reference”.
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