AI agents for business finance: what they can and can't do
What AI agents can do in bookkeeping, close, collections and compliance today, where a person must stay in charge, and how to judge a product.
The short answer
An AI agent can keep a separate aged-debt list for pound and naira invoices, draft reminders in the right tone and currency, spot short payments that are really Nigerian withholding tax, and prepare UK statutory interest claims. A person should approve every message before it goes, and decide on escalation, interest and write-offs. In the UK, statutory interest on late business payments is 8% plus the Bank of England base rate unless the contract says otherwise.
Chasing money is repetitive work that still needs judgement. A UK business with clients in Lagos and London faces two sets of habits: different payment cultures, different currencies, and Nigerian customers who may deduct tax before paying. An agent can take on the routine part. This guide sets out which part, using the Finance agent model where the agent prepares and a person approves.
What the agent prepares
- Aged-debt lists by currency. Keep pound and naira invoices in separate lists. Converting naira debts into pounds for one list hides which customers owe what in the currency they will pay.
- Due-date tracking. Payment terms from each contract, not a default. GOV.UK says that if no date is agreed, a payment is late 30 days after the customer receives the invoice or you deliver the goods or service, whichever is later.
- Draft reminders. A friendly note before the due date, a firmer one after, a statement of account at 30 days overdue.
- Short-payment checks. Matching receipts against invoices and flagging anything paid short.
- Interest calculations. For UK business customers, a draft statutory interest figure for a person to decide on.
What a person decides
| Decision | Why it stays with a person |
|---|---|
| Whether to send each reminder | Relationships, ongoing disputes and context the agent cannot see |
| Claiming statutory interest | Legal right, but a commercial choice |
| Accepting a part payment or plan | Changes what is owed |
| Writing off a debt | Affects accounts and tax |
| Passing to a lawyer or collector | Cost and reputation |
Naira invoices that arrive short
Nigerian companies often deduct withholding tax before paying a supplier. PwC's Nigeria tax summary, reviewed on 29 May 2026, gives 5% for resident recipients and 10% for non-residents on consultancy, technical, management and professional fees. A UK supplier paid by a Lagos company will often see 10% missing. Before the agent drafts a reminder for the gap, it should check the ratio: a receipt of exactly 90% of the invoice is probably tax, not a debt.
Example
Example figures only. A UK agency invoices a Lagos client ₦3,000,000. It receives ₦2,700,000. The agent flags the ₦300,000 shortfall as 10% and drafts a note asking for the withholding tax receipt, not for the money. The agency's manager approves and sends it. The invoice is closed in the ledger with ₦300,000 recorded as tax deducted, pending the receipt. The treatment for the UK supplier is in Nigerian WHT on a UK invoice.
Statutory interest on UK invoices
GOV.UK says that for business-to-business transactions, statutory interest is 8% plus the Bank of England base rate, and it does not apply if the contract sets a different rate. To work out the daily figure, take the annual interest on the debt and divide by 365.
Example
Illustration only, using an assumed base rate of 4%; check the Bank of England's current rate. A £10,000 invoice is 45 days late. The rate would be 12%, so annual interest is £1,200, the daily amount about £3.29, and 45 days about £147.95. The agent drafts the figure; a person decides whether claiming it is worth the relationship. GOV.UK also lets you claim debt recovery costs on a separate page we have not summarised here.
Keep the ledger accurate while you chase
Chasing goes wrong when the ledger is wrong. Before a reminder is drafted, the agent should check that no payment has arrived in the other currency's account, that a credit note has not been issued, and that the customer has not already queried the invoice. A reminder for an invoice the customer paid last week, or disputed in writing, costs more goodwill than any late payment is worth. Ask the agent to show its evidence with each draft: the invoice, the last payment received and any correspondence, so the person approving can see why the reminder is due.
Tone and channel for each market
Agents draft better when given a few rules per customer group:
- Address the person who approves payments, not only the accounts inbox.
- Quote the invoice number, amount and currency exactly as invoiced.
- Include the correct payment details for that currency, so the customer does not need to ask.
- For naira invoices, state whether you expect withholding tax to be deducted and ask for the receipt.
- Escalate by step, never jump from friendly to final notice.
Good invoices make chasing easier; see invoicing and deposits and milestones for foreign clients. For the wider set of agent tasks, see AI agents for back-office work.
Where Pryme fits
On a Pryme Business Account, invoices can be issued in the currency you are paid in, and receipts land in the matching balance. The Finance agent prepares aged-debt lists, reminders and short-payment flags; a person approves each one, and actions are recorded.
Questions people ask
Can an AI agent send payment reminders automatically?
It can draft and schedule them, but a person should approve what is sent, especially for customers with disputes or special terms.
What is the statutory interest rate on late business payments in the UK?
GOV.UK says 8% plus the Bank of England base rate for business-to-business transactions, unless the contract sets a different rate.
Why did my Nigerian client pay 10% less?
Probably withholding tax. PwC's summary gives 10% on professional and consultancy fees paid to non-residents. Ask for the WHT receipt.
When is a UK invoice late if no date was agreed?
GOV.UK says 30 days after the customer receives the invoice or you deliver the goods or service, whichever is later.
Sources
- GOV.UK: Late commercial payments, charging interest · accessed Oct 2026
- GOV.UK: Late commercial payments, interest and debt recovery · accessed Oct 2026
- PwC Worldwide Tax Summaries: Nigeria corporate withholding taxes (reviewed 29 May 2026) · accessed Oct 2026
This article is general information, not financial, legal or tax advice. Products described are provided under the terms on this site and are subject to regulation and eligibility.