Contract amendment generator

How to draft a contract amendment

1. Enter the original agreement: its name (for example "Master Services Agreement"), its date, any earlier amendments, and the two parties' legal names. Add each party's entity description and the short name the agreement uses for it, if any.
2. Choose the amendment number (First to Tenth) and the effective date, or tick "Effective when the last party signs".
3. Add each change: pick its type, enter the section number and the new text, wording or end date. You can add up to 10 changes.
4. Select "Draft the amendment". If a required field is missing, the generator lists what to fix and takes you to the field.
5. Read the checks above the draft, edit any field and draft again, then copy the text or download it as .txt, .md or a printable .html file.

The contract amendment generator works in any current browser with JavaScript turned on. Nothing to install, no file upload, and the draft appears as soon as you select the button. Optional fields are marked; leaving a signer's name or title blank gives a line to fill in by hand.

What the contract amendment generator produces

The contract amendment generator is rule-based: it assembles the amendment from fixed clauses Gavel wrote and fills them with what you enter. It does not use AI and does not read the original agreement. Every draft has the same parts, in this order:

1. A title ("FIRST AMENDMENT TO THE MASTER SERVICES AGREEMENT") and a preamble naming the parties, with entity descriptions and short names if you gave them, and the Amendment Effective Date (a fixed date, or "the date of the last signature below").
2. Recitals: the parties are parties to the agreement of that date (as amended by any earlier amendments you list), and they wish to amend it.
3. Provision 1, Definitions: capitalized terms not defined in the amendment have the meanings given in the agreement.
4. One numbered provision per change, worded by its type (below).
5. References to the Agreement, No other changes (the agreement otherwise remains in full force and effect), Conflict (the amendment controls), Governing law (the same law as the agreement), and Counterparts and electronic signatures.
6. A signature block for each party: name, By, Name, Title and Date.

Section numbers can be typed as "4.1" or "Section 4.1"; the generator removes the word "Section" so it is not repeated. Before drafting, it stops with a message if the agreement name or date, either party's legal name, the effective date, a section number, new text or new wording is missing; if both parties have the same name; if the effective date is before the agreement date; if the current and new wording are identical; or if a new end date is not later than the current end date, the agreement date and the effective date.

With the draft it shows checks to act on: Review when two changes affect the same section; Note when a section reference has no number in it, when a term is replaced everywhere (search the agreement for every use, including headings and exhibits), when an extension has no current end date, or when the amendment number is above First and no earlier amendments are listed.

Worked example

Fictional example (the "Try an example" button fills it in). Northwind Analytics, Inc., a Delaware corporation ("Northwind"), and Brightline Health LLC, a California limited liability company ("Brightline"), signed a Master Services Agreement dated March 1, 2025. They want a First Amendment, effective December 1, 2026, with two changes: extend the term in Section 2.1 from December 31, 2026 to December 31, 2027, and in Section 5.1 change "$12,000 per month" to "$13,500 per month". Signers: Dana Whitfield, Chief Executive Officer, and Marcus Oyelaran, General Counsel.

The contract amendment generator drafts "FIRST AMENDMENT TO THE MASTER SERVICES AGREEMENT" with recitals A and B and eight numbered provisions. The two that carry the changes read:

• 2. Extension of the term. The term of the Agreement, as set out in Section 2.1 of the Agreement, is extended so that it ends on December 31, 2027, instead of December 31, 2026. Except for this new end date, Section 2.1 is unchanged.
• 3. Change to Section 5.1. In Section 5.1 of the Agreement, each instance of "$12,000 per month" is replaced with "$13,500 per month".

Provisions 4 to 8 are References to the Agreement, No other changes, Conflict, Governing law, and Counterparts and electronic signatures, followed by signature blocks for NORTHWIND ANALYTICS, INC. (Name: Dana Whitfield, Title: Chief Executive Officer) and BRIGHTLINE HEALTH LLC (Name: Marcus Oyelaran, Title: General Counsel). The only check shown is OK: built from 2 changes and the standard closing clauses.

What it does not do

• It does not read the original agreement, so it cannot check that a section number exists, that the current wording appears where you say, or that the agreement allows amendment in this form.
• It does not know which side you are on or what your firm's positions are. It does not suggest edits or judge whether a change is favorable.
• It drafts amendments between two parties. Agreements with three or more parties, assignments, novations and amended and restated agreements need a different document.
• Its closing clauses are fixed. If the agreement has its own rules on notices, signatures or governing law that the amendment should follow, edit the draft.
• It is general and US-focused, and it is not legal advice. Rules differ by state; check the law that governs the agreement. The draft is a starting point for a lawyer to review.

When to use it

• Extend a services agreement before it expires: enter the section that sets the term and the new end date, and add a fee change in the same amendment.
• Update pricing or a defined term: replace "$12,000 per month" in one section, or rename a defined term such as "Authorized Users" everywhere it appears.
• Rewrite or add a clause after a negotiation: replace a support section with the agreed text, add a new service-credit section, or delete a section that no longer applies.
• Record a second or later amendment: list the earlier amendments so the recitals describe the agreement as already amended.

Next step: your own amendment template, automated

Copy the draft into your word processor, compare it against the original agreement, and send it for review. If your firm drafts amendments often, Gavel Workflows, Gavel's no-code document automation platform, turns your own amendment template into a questionnaire that fills in your clauses, adds or removes them by rule, and outputs Word or PDF. Plans and prices are on the pricing page.

For a one-off amendment drafted inside Microsoft Word from your precedent, Gavel Exec drafts and rewrites clauses with AI, as tracked changes (Gavel Exec pricing). Unlike Gavel Exec, the free contract amendment generator does not use AI.

Related tools

• Contract comparison tool: compare the original agreement with an amended version to see every inserted and deleted word.
• Contract summary generator: find the term, renewal and payment sections of the original agreement before you amend them.
• Contract clause checker: check a clause you are adding for the terms lawyers most often negotiate.
• All of Gavel's free tools for lawyers.