How to Use AI to Check a Contract Before You Sign

Use AI to find the questions, not the answers. It is genuinely good at spotting what a contract does not say, flagging terms that differ from the norm, and translating clauses into consequences. It is unreliable at telling you whether something is enforceable where you live. Run it as a first pass that produces a list to ask about, and the hour you eventually spend with a lawyer gets much more useful.

The four passes, in order

1. What am I actually agreeing to

Before anything else, get the obligations in a table. This catches the contracts where the terms are fine but there are more of them than you realised.

List every obligation this contract places on ME, as a table:
obligation | deadline or trigger | what happens if I miss it | clause reference

Then do the same for the other party.
If an obligation has no stated consequence, say so explicitly.

2. What is missing

This is where AI earns its place, because absence is hard for a human to notice and easy for a model that has seen the standard shape of an agreement.

Compare this contract against what a standard [service agreement / lease / SOW]
normally contains. List clauses that are ABSENT, and for each one say what
risk the absence creates for me. Do not comment on clauses that are present.

Missing termination rights, no cap on liability, no clause about what happens to your data at the end, and no process for changing the scope are the four that matter most often for small businesses.

3. What is unusual

Flag any clause that is more aggressive than typical for this kind of agreement,
and say plainly how it differs from the usual version. Quote the clause.

Insist on the quote. A flag without the text is unverifiable, and models are prone to describing a clause slightly more alarmingly than it reads.

4. What would this cost me if it went wrong

Translate the worst case into a number, or into a plain statement if a number is not available. "Unlimited liability for any breach of confidentiality" means more to most people phrased as "there is no ceiling on what you could owe".

Paste with care

A contract you have not signed is usually confidential, and pasting it into a consumer AI tool may itself breach a confidentiality obligation in a previous agreement. Check whether your tool trains on your input and turn that off, prefer a business tier with a no-training commitment, and redact counterparty names and figures if you are unsure. What to do if an AI tool leaks your data is the recovery path, but not pasting it is cheaper.

What it gets wrong, specifically

That last row is the practical one. "Is this contract okay to sign?" is close to useless as a prompt, because the agreeable answer is the likely one. "What are the three worst things in this contract for me?" gets a substantively different response from the same document.

Take the output to a human

The output of the four passes is a short list of specific, referenced questions. That is a far better use of a paid hour than handing over the document and asking what they think, and it is the whole argument for doing this at all. If you are on the other side of the process and drafting rather than reviewing, drafting an NDA for an AI project covers that, and the question of letting software execute agreements is separate again: whether an agent can sign on your behalf. More on where AI helps a small business generally is in the wider guide to AI for small business.

Frequently asked questions

Can AI replace a lawyer for contract review?

No. It can make the lawyer's hour more productive by arriving with specific questions instead of a document. Enforceability, jurisdiction and negotiating leverage are outside what it can reliably do.

Is it safe to upload a contract to an AI tool?

Only after checking the training and retention settings, and only if you are not bound by a confidentiality term that forbids it. Redacting names and figures is a reasonable middle path.

What is the single most useful prompt?

The absence one. Asking what a standard agreement of this type contains that this one does not is the pass that most reliably surfaces something you would have missed.

Does this work for terms of service I did not negotiate?

Yes, and it is arguably more useful there, because nobody reads them. The obligations table on a supplier's terms takes two minutes and occasionally finds something worth knowing before you depend on the service.