Payment Terms & Late Fees

How to Set Up a Payment Plan

Agree the total owed, an upfront payment, instalment amounts and dates, and a default clause — then put it all in writing. A documented plan is what makes the arrangement enforceable.

In this answer

  • Confirm the exact amount owed
  • Secure an upfront payment
  • Set realistic instalments and dates
  • Add a default clause that protects you
  • Document and monitor the plan

5 min

Agree the amount and an upfront payment

Start by confirming the exact total that is owed, including any interest already accrued under your terms of trade. Both sides genuinely need to agree this figure before you move on to discussing instalments, because if the headline number is disputed you will only end up arguing about it again later, halfway through the plan. Pin it down clearly and in writing first.

Then ask for a meaningful payment upfront, before the instalment schedule even begins. An upfront payment does three useful things at once: it reduces the outstanding balance straight away, it tests whether the customer's good faith is real, and it signals to both of you that the plan is genuine rather than a delaying tactic. A customer who pays something on day one is far more likely to see the plan through than one who offers only promises.

Set instalments you can both live with

Break the remaining balance into instalments with specific amounts and specific dates, not loose intentions. Keep the plan as short as the customer can realistically manage, because a long, drawn-out schedule simply increases the chance that something in their circumstances changes and the plan falls over before it finishes. A shorter plan that clears the debt quickly is almost always better than a generous one that never quite completes.

Amounts
Fixed instalments the customer can genuinely meet, rather than optimistic figures that set them up to default.
Dates
Specific calendar dates, ideally aligned to the customer's own pay or invoicing cycle so the money is there.
Method
A reliable channel, with direct debit preferred wherever the customer will agree to it.

Spelling each of these out leaves no room for misunderstanding about what is due and when.

Add a default clause

Protect yourself with a clear default term written into the plan: if the customer misses an instalment, the entire remaining balance becomes immediately due in full. This single clause stops a plan from quietly degenerating into an open-ended series of renegotiations every time a payment is missed, and it gives you a clean, agreed basis to escalate the moment the customer stops performing. Without it, each missed payment becomes a fresh negotiation rather than a breach.

If your terms of trade allow it, you can also continue charging interest on the outstanding balance for the duration of the plan, which removes any incentive for the customer to stretch it out. As always, interest is only enforceable if it is set out in your agreed terms of trade. This is general information, not legal advice.

Document and monitor

Put the whole arrangement in writing, leaving nothing to memory: the total owed, the upfront payment, each instalment amount and date, the payment method, and the default clause. Both parties should acknowledge it, and a simple email exchange is perfectly enough — there is no need for anything formal. The key point is that a documented plan is enforceable if it goes wrong, whereas a purely verbal one is very hard to prove and easy for the customer to walk away from.

Then actually monitor it rather than filing it and forgetting. Diarise each due date, follow up the very moment a payment is missed rather than letting it slide, and act on your default clause without delay if the plan collapses. If recovery becomes necessary, you can refer the debt to Merion on a commission-only basis. And for guidance on when a plan is appropriate in the first place, see should I offer payment plans.

Key takeaways

  • Confirm the exact amount owed before instalments
  • Get a meaningful upfront payment to test good faith
  • Set short, specific instalments tied to clear dates
  • Include a default clause making the balance due
  • Document the plan in writing and monitor it closely

Frequently asked questions

Should the plan be in writing?

Yes. A written plan setting out amounts, dates and a default clause is enforceable; a verbal arrangement is hard to prove and easy for a customer to ignore.

How long should a payment plan run?

As short as the customer can realistically manage. Longer plans carry more risk that circumstances change, so prioritise getting the balance cleared quickly.

Can I use direct debit for the instalments?

Direct debit is ideal because it removes the customer's need to remember each payment. Get written authority and confirm the schedule before the first debit.

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