Agree invoice timing, due dates, deposits, expenses and late-payment handling before work begins.

Follow-up sequence for an overdue invoice
Follow-up sequence for an overdue invoice

Define the payment clock

State when invoicing happens and when the due period starts. Put an actual due date on the invoice.

Handle changes and expenses

Explain who approves extra work, how it is priced and which expenses need approval.

Write a proportionate follow-up path

Move from a courteous check to a formal request while keeping the agreement and delivery evidence.

Treat statutory interest carefully

Contracts and eligibility matter. Check current official guidance before adding a charge.

Define the payment clock in practice

A designer agrees a 30% deposit, invoices the balance on delivery and allows 14 calendar days. The written terms say how extra revisions are approved and where the invoice reference must appear. When payment is late, the first message confirms receipt and asks for a payment date before any formal escalation is considered.

Treat statutory interest carefully review

Review the contract before quoting interest or recovery costs. Statutory rules, eligibility and an agreed contractual rate can change the correct approach. Keep delivery evidence and a factual communication timeline, and distinguish a disputed invoice from one that has simply passed its due date.

Payment terms should explain deposits, milestones, expenses, acceptance and the event that starts the due period. Put the resulting date on each invoice rather than making the client calculate it. A reminder sequence can begin with a neutral confirmation, then state the overdue facts and requested action. If the client disputes scope or quality, route that issue to the agreed resolution process instead of continuing an automated sequence that assumes the debt is undisputed.

Put the process into practice

Open the matching Billoz workflow, then use the calculator or planning tool to check the relevant figures.

Sources

Written and reviewed by the Billoz editorial team at WILLIATION TECHNOLOGIES LTD. Published 1 May 2026; reviewed 19 September 2026.