Industries
Recovering Unpaid Invoices for Marketing Agencies
Last updated: June 2026
Why do marketing agencies get paid late?
Agency work is easy for a client to delay paying for because much of its value is intangible. A campaign concept, a brand direction or a content calendar feels less "finished" than a physical product, so a stretched client can push the bill down their list. Late payment is rarely about one cause — it is usually a mix of the factors below.
| Common cause | What it looks like in agency work |
|---|---|
| Subjective deliverables | The client says the creative "isn't quite right" after it was approved, then withholds payment. |
| Retainer ambiguity | A monthly retainer is queried because the client cannot see what was delivered that month. |
| Scope creep | Extra rounds, new channels or rush requests were done on goodwill and never formally agreed in writing. |
| Approvals by email | Sign-off was given by a junior or in a passing message, and is now disputed or denied. |
| Slow internal sign-off | Invoices sit unpaid while the client's finance and marketing teams pass them between each other. |
What evidence matters most in agency disputes?
The strongest recovery position ties the money owed to a documented chain: what was agreed, what was delivered, and that the client accepted it. For creative and campaign work, the records that carry the most weight are the ones that show a clear request, a clear deliverable, and a clear written approval.
| Evidence | Why it helps |
|---|---|
| Signed contract or statement of work | Sets the scope, deliverables, fees and payment terms you are relying on. |
| The brief and any change requests | Shows what the client asked for, including extra work added later. |
| Delivered files and proofs | Demonstrates the campaign assets, designs or content were actually produced and handed over. |
| Written approval or sign-off | An email or message accepting the work undercuts a later "it wasn't approved" objection. |
| The invoice and reminders | Proves the amount, the due date and that you chased payment. |
| Proof of delivery / publishing | Live links, send confirmations or analytics showing the work went out as agreed. |
How does WolfX structure agency invoice recovery?
WolfX helps you build an evidence-backed recovery workflow for each overdue invoice rather than chasing from memory. You store the contract, brief, deliverables and approvals in an Evidence Vault, reference them against the debt, and use that organised record to prepare a Letter Before Action and, if needed, a Court Readiness Pack for internal, solicitor or pre-action review.
| Step | What you do in WolfX |
|---|---|
| 1. Gather the evidence | Store the contract, brief, delivered files and sign-off in the Evidence Vault and link them to the invoice. |
| 2. Confirm the position | Set out the amount due, the due date, and any statutory interest and compensation. |
| 3. Prepare a Letter Before Action | Generate a structured LBA that references the evidence and gives the client a deadline to respond. |
| 4. Assemble a Court Readiness Pack | If the client still does not pay, organise the records for solicitor or pre-action review. |
A Court Readiness Pack is an organised bundle of your own records. It is not a court filing and not an official or certified court document. WolfX does not guarantee recovery, does not file court claims for you, and does not collect payments on your behalf.
Can an agency charge interest on a late invoice?
For overdue UK business-to-business invoices, you can usually charge statutory interest of 8% plus the Bank of England base rate. With a base rate of 3.75% as of June 2026, that is 11.75% a year, plus a fixed compensation sum per qualifying debt. This applies subject to your contract terms and the facts. Many agencies also write their own interest term into the contract; check which remedy you are relying on.
What is WolfX not?
WolfX is software for organising overdue-invoice evidence and preparing recovery documents. It is not a law firm, not a court, not a regulated debt collector and not a payment processor. It does not provide legal advice, does not guarantee that you will recover the money, does not currently file court claims for users, does not collect debtor payments directly, and does not send physical post. For advice on your specific dispute, speak to a qualified solicitor.
WolfX is software for evidence-backed invoice recovery workflows. WolfX is not a law firm, debt collection agency, court, or payment processor. This site provides general information, not legal advice.
Sources
- Late Payment of Commercial Debts (Interest) Act 1998 — legislation.gov.uk
- Late commercial payments: charging interest and debt recovery — GOV.UK
- Bank of England official Bank Rate — Bank of England
- Practice Direction on Pre-Action Conduct and Protocols — Ministry of Justice (Civil Procedure Rules)
Frequently asked questions
What evidence proves creative work was delivered and approved?
The clearest chain is the brief or statement of work, the delivered files or proofs, and a written approval — an email or message where the client accepts the work. Proof that it went live, such as published links or send confirmations, also helps. Stored together and linked to the invoice, these records show the work was both requested and accepted.
Does the 30-day Pre-Action Protocol for Debt Claims apply to my agency clients?
The Pre-Action Protocol for Debt Claims applies only where the debtor is an individual or a sole trader. Where your client is a company, you follow the Practice Direction on Pre-Action Conduct, which typically allows a shorter response window of around 14 days. This is general information, not legal advice — check who your debtor actually is.
Can I recover unpaid retainer fees the same way?
Yes. A retainer is recovered on the same evidence-led basis: the agreement setting the monthly fee and scope, a record of what was delivered in the period, and the unpaid invoices and reminders. WolfX helps you organise that into a Letter Before Action, but it does not guarantee recovery or file claims for you.
Turn your agency's scattered approvals into an evidence-backed recovery.
Related
Recovering unpaid invoices in the UK
The evidence-led escalation ladder from reminder to court as a last resort.
Letter Before Action
How WolfX helps you prepare a structured LBA referencing your evidence.
UK Late Payment Interest Calculator
Work out statutory interest and compensation on an overdue invoice.