The short answer
A wedding contract addendum is a separate document, signed by you and the vendor, that adds to or changes the terms of your signed agreement. Use one when a change affects price, payment dates, services, hours, guest count terms or cancellation. Check your contract for how it says changes must be made, and make the addendum name the original agreement and state each change exactly.
What is a wedding contract addendum?
It is a document added to a contract after, or alongside, the original, that changes or adds terms. Vendors may call it an addendum, an amendment, a change order, a rider or a revised agreement. The label matters less than what it does: it should identify the agreement it belongs to, say exactly what is changing, and be signed and dated by the same parties.
An addendum is different from a new quote or a friendly email. A quote shows a price on offer; an email may show that you discussed a change. An addendum is meant to become part of the contract itself, so that the terms you rely on are all in signed documents you can put side by side.
Can you change a wedding contract after signing it?
You can change a signed wedding contract if you and the vendor both agree, and the contract may say how. Read it for an amendments or modifications clause. Some say the agreement can be changed only in a writing signed by both parties; others are silent. Whether an email exchange counts as a change under your contract depends on its wording and on state law, and a signed addendum avoids having to answer that question later.
As a working rule for your own records, put a change in an addendum when it affects money, dates, hours, what the vendor provides, guest count terms, or what happens if either side cancels or postpones. Small logistical details, such as a delivery contact, can stay in email, saved with the contract.
- Price or total
- Payment amounts or due dates
- Services, hours or items provided
- Event date, times or location
- Guest count or minimum terms
- Cancellation, postponement or refund terms
What should a wedding contract addendum include?
Start by identifying the original: the names of both parties as they appear in the contract, the agreement date or number, and the event date. Then list each change as its own numbered item, naming the section it changes, the original wording or figure, and the new wording or figure. Vague lines such as "add second shooter" leave room for disagreement about hours, price and delivery.
Show the effect on money in the addendum itself: the old total, the new total, and the revised payment schedule. Include a sentence stating that all other terms of the original agreement stay the same, an effective date, and signatures and dates from the same people who signed the original, or someone with authority to sign for the vendor.
- Parties and original agreement date
- Each change numbered, with the section it changes
- Old and new wording or figure
- Old total, new total and revised payment schedule
- Statement that other terms are unchanged
- Effective date
- Signatures and dates from both sides
How do you write a contract addendum for a price change?
For example, a hypothetical photography contract covers eight hours for $4,800, with a $1,500 retainer paid and a $3,300 balance due before the wedding. You agree to add one hour at the contract overtime rate of $400 and a second photographer for $600. The new total is $4,800 + $400 + $600 = $5,800, and the balance becomes $5,800 - $1,500 = $4,300.
The addendum could say: "Section 2 is amended to provide nine hours of coverage, from 2:00 p.m. to 11:00 p.m., and a second photographer for six of those hours. Section 3 is amended so the total fee is $5,800, replacing $4,800. The remaining balance is $4,300, due on the date stated in Section 4." Each figure can be checked against the original.
How do I keep track of addenda and contract versions?
Number each addendum and keep it in the same folder as the contract, named with the vendor, the number and the date. Keep a short log listing each addendum, what it changed and when it was signed by both sides. When a later addendum changes the same term again, note that the earlier one has been replaced on that point.
Update your budget and payment calendar the day an addendum is signed, so the figures you plan with match the signed terms. Before the final invoice arrives, read the original and each addendum in order to know the current figure for each line.
What if the vendor will not put a change in writing?
Ask again, explaining that you want your records to match what you agreed. If the vendor prefers email, send your own written summary of the change, with the section, the old and new terms and the price, and ask them to reply confirming it. Save the exchange with the contract.
If the change involves a significant amount and the vendor will not confirm it in any written form, note the date and what was said. Rules about how contracts can be changed vary by state; a qualified attorney licensed in your state can tell you where that leaves you.
Addendum log
Use one row for a decision or deliverable. Keep unanswered items visible. Download the blank worksheet to open in Excel, Numbers or Google Sheets.
On a small screen, swipe the worksheet sideways to see the remaining columns.
| Term changed | Original wording or figure (section) | New wording or figure | Price effect | Signed by both sides (date) |
|---|---|---|---|---|
| Hours or coverage | — | — | — | — |
| Services or items | — | — | — | — |
| Guest count or minimum | — | — | — | — |
| Price and total | — | — | — | — |
| Payment schedule | — | — | — | — |
| Event date, times or location | — | — | — | — |
| Cancellation or postponement | — | — | — | — |
| Other | — | — | — | — |
A message you can make your own
Change the wording to suit you, fill in anything in brackets and keep the questions that apply. You decide what to send and send it yourself.
Thank you for agreeing to [change] for our wedding on [date]. So that our agreement dated [date] reflects it, could you send a short addendum for both of us to sign? We would like it to name the section being changed, the original and new terms, the new total and remaining balance, and any change to the payment dates, with a line confirming that all other terms stay the same. If you have your own change form, that is fine too.
Common questions
Is an email enough to change a wedding contract?
Whether an email is enough to change a wedding contract depends on the wording of the contract and on state law, which varies. Some contracts say changes must be in a writing signed by both parties. A signed addendum removes the question, so ask for one for any change that affects money, dates or services.
What is the difference between an addendum and an amendment?
An addendum and an amendment are both ways to change or add to a contract, and vendors use the two words in different ways. Some use "amendment" for a change to existing terms and "addendum" for added terms. What matters is that the document names the original agreement, states each change exactly, and is signed and dated by both sides.
Does a contract addendum need to be signed by both parties?
A wedding contract addendum should be signed and dated by both parties, the people who signed the original contract or someone with authority to sign for the vendor. If a different person signs for the vendor, ask them to confirm their role in writing, and keep the fully signed copy with the contract.
Does an addendum restart the cancellation schedule?
An addendum changes the cancellation schedule only if it says so. Read whether the addendum changes the cancellation terms or the amounts they are based on, such as the total. If the effect is unclear, ask the vendor to state it in the addendum itself before you sign.
Can I write a wedding contract addendum myself?
You can draft a wedding contract addendum as a plain summary of the change and send it to the vendor to review and sign, or ask the vendor to use its own change form. Either way, check each figure against the original contract before signing, and keep the signed copy with the contract.
Is there a wedding contract addendum template?
A wedding contract addendum template is less important than the parts it must hold: the parties and original agreement date, each change numbered with the section it changes, the old and new terms, the old and new totals, a line saying other terms stay the same, and both signatures. The sample wording and checklist on this page cover each part.