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
A UK sole trader can deduct the cost of a trip to Nigeria made for business, including fares, hotel rooms and meals on overnight stays, because GOV.UK lists them as allowable travel expenses. The test is that the cost is wholly and exclusively for the business. HMRC's manual says that where a trip has a dual purpose, such as business plus a holiday, the costs are disallowable, so a client trip that is also a family visit is at risk.
Flying to Lagos for a client workshop is a real business cost. Flying to Lagos for Christmas and fitting in a client lunch is not. Most Nigerian freelancers in the UK have trips somewhere in between, and that is where the rules bite. This guide covers sole traders and partners claiming expenses in Self Assessment; company directors claiming from their own company face different rules.
What GOV.UK lists as allowable
GOV.UK's self-employed expenses page lists as allowable: train, bus, tram, air and taxi fares; hotel rooms; and meals on overnight business trips, plus vehicle running costs. It lists as not allowable: non-business travel, fines, and travel between home and work.
The wholly and exclusively test
Behind the list is the rule in section 34 of ITTOIA 2005: a deduction is allowed only for expenses incurred wholly and exclusively for the trade. HMRC's Business Income Manual (BIM37610, updated 4 August 2026) puts its approach in one line: "Where you establish duality of purpose in travel, the costs are disallowable."
The leading case it cites is Bowden v Russell & Russell (1965). A solicitor travelled to two professional conferences in North America with his wife, also intending a holiday. He claimed only his own costs. The whole claim was refused, because the trip had two purposes: his profession and a holiday. Excluding his wife's costs did not save it.
What this means for a Nigeria trip
| Trip | Likely position |
|---|---|
| Five days in Abuja for client meetings, flown out and back for that purpose | Strong claim for fares, hotel and overnight meals |
| Two weeks at home for a wedding, one afternoon with a client | Dual purpose; the fare is at serious risk |
| A week of client work, then a week with family | Arguable; the business week's hotel and meals are easier to support than the fare |
| Family pays for your stay, you visit a client | Little or no hotel cost to claim anyway |
Whether part of a mixed trip can be claimed is a question to put to an accountant, with your evidence of what each day was for. Do not assume a percentage split will be accepted.
Planning a trip that will hold up
- Fix the dates around the client's needs and get them confirmed in writing before you book.
- Book a return flight that matches the business dates, not the festive season.
- If you want family time, consider making it a separate trip, or accept that the fare may not be claimable.
- Keep hotel bookings in your own name for the business nights only.
- If a client invites you to speak or train, keep the invitation; it is direct evidence of purpose.
Evidence to keep
- Emails or a contract showing the client asked for or agreed to the meeting, and when.
- An itinerary showing working days, meeting times and places.
- Booking confirmations and receipts, converted to pounds at the rate on the day paid.
- Notes of what was done on each working day.
- Visa and travel documents if they were needed only for the business trip.
A worked example
Example only. Emeka, a sole-trader consultant in Leeds, flies to Lagos to run a three-day training course for a client that has paid him a fee for it. Return flight £780, four hotel nights at £110 (£440), and dinners on the four nights totalling £120. He arranges the dates around the client, sees no family on the trip, and keeps the client's booking email. He claims £1,340 in travel expenses. If instead he had stayed a further ten days for a family event, the flight would be the item most open to challenge on dual-purpose grounds.
Other costs on the trip
- Phone data and roaming used for work may be allowable; personal calls home are not. See phone and internet costs.
- Client entertaining has its own restrictions; check with an accountant before you claim a client dinner.
- If the client reimburses your costs, tell your accountant so the income and the cost are treated consistently.
For the visa side of business travel, see business visas for UK freelancers going to Nigeria.
Where Pryme fits
Paying trip costs from a Pryme account in naira keeps them separate from personal spending, and the statement shows each payment with its date. You can convert pounds to naira with Swap before you travel, seeing the rate and the fee first.
Questions people ask
Can I claim flights to Nigeria as a business expense?
Yes, if the trip is wholly and exclusively for business. GOV.UK lists air fares, hotel rooms and overnight meals as allowable travel expenses for the self-employed.
What if I visit family on a business trip to Nigeria?
HMRC's manual says that where a trip has a dual purpose, the costs are disallowable. Keep evidence of the business purpose and take advice on mixed trips.
Can I claim part of a trip that was half business, half holiday?
Do not assume a split will be accepted. Ask an accountant, with a day-by-day record of the trip.
What records do I need for a Nigeria business trip?
Client emails, an itinerary, receipts converted to pounds and notes of the work done each day.
Sources
- GOV.UK: Expenses if you're self-employed, car, van and travel expenses · accessed Oct 2026
- HMRC Business Income Manual BIM37610: duality of purpose, overseas conference plus holiday (updated 4 Aug 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.