How to Ask a Client to Change Payment Terms in Writing

Cash flow is a problem for many small businesses and freelancers, and long payment terms make it worse. You might want to move a client from 60-day to 30-day terms, introduce a deposit, add late payment charges, or switch from invoicing on completion to invoicing in stages.

Clients rarely enjoy these requests. But most will accept a clear, reasonable change with notice. What causes friction is surprise: a new term appearing on an invoice without warning.

Give Notice And A Start Date

Apply the change from a future date, ideally the next contract renewal or the start of a new project, with at least 30 days’ notice. Do not change terms on work already agreed unless the client agrees.

Give A Short, Honest Reason

You do not need to justify your business in detail. One sentence is enough:

• “To keep our cash flow predictable as we grow.”
• “Our costs for materials are now paid upfront to suppliers.”
• “We are standardising terms across all clients.”

Make The New Terms Concrete

State exactly what changes: payment days, deposit percentage, payment methods, what happens if payment is late.

A Before And After

Before:

Hi, just letting you know we need to be paid quicker from now on, 60 days is too long for us. Can you sort that? Thanks

After:

Hi Elena, I am writing to let you know about a change to our payment terms. From 1 December 2026, our standard terms will be 30 days from invoice date, rather than 60. For projects over £5,000, we will also invoice a 30% deposit on approval. This brings our terms in line with our suppliers, who now ask us to pay for materials upfront. All work already agreed will stay on the current terms. If this causes any difficulty with your payment cycle, I am happy to talk it through.

The second version gives a date, exact terms, a reason, a reassurance about existing work, and an invitation to discuss.

Check What The Contract Says

If you have a signed contract, the existing terms usually apply until it ends or is amended. Changes may need written agreement. Late payment rules also vary by country: in the UK, for example, the Late Payment of Commercial Debts rules allow statutory interest and compensation on overdue B2B invoices. Know your rights before you write.

Big Clients And Procurement

Large organisations often have fixed payment cycles set by their procurement teams. They may not be able to change terms for you. In that case, consider:

• A higher price that reflects the longer terms.
• Stage payments, so you are paid as work progresses.
• Invoicing promptly and accurately, since many delays come from invoices rejected for missing purchase order numbers.

Follow Up In Writing

If the client agrees in a call, confirm the new terms by email and update your contract or terms document. See how to write a late payment reminder email for when payments do arrive late, and how to write a price increase letter, which follows a similar structure.

A Context For Commercial Changes

A Wrivio Context for this could say:

Rewrite this as a polite, professional email to a client about a change in payment terms. Clear and confident, not apologetic. State the start date, the exact new terms, a brief reason, and what stays the same, then offer to discuss. Keep every date, number, percentage and term exactly as written. Do not add penalties, discounts or conditions that are not in the original.

Press Ctrl+Shift+Space, paste your draft, and check every percentage and date before sending. A wrong number in a terms change is hard to walk back.

Common Questions

Can I change payment terms on an existing contract?

Usually only by agreement or under a clause in the contract that allows it. Apply new terms to new work or at renewal, and get written agreement where needed.

How much notice should I give?

At least 30 days, and ideally from the next billing period, contract renewal or new project.

Should I offer a discount for faster payment?

Some businesses offer a small early payment discount. It can work, but it costs you margin; set it carefully and state the conditions precisely.

What if the client refuses?

Discuss alternatives such as stage payments or adjusted pricing. If the terms make the work unviable, you may decide not to take on new projects on the old terms.

Download Wrivio for Windows to write confident payment-term changes that clients accept.