MTD ITSA: Foreign Income & Exchange Rates — Guide for Expats & Traders

Why foreign income and exchange rates matter under MTD ITSA

Making Tax Digital for Income Tax (MTD ITSA) changes how UK taxpayers record and report income. From April 2026 the new quarterly reporting regime affects people with foreign income as well as domestic receipts. If you are a UK resident who receives rental income abroad, a sole trader with sales denominated in foreign currency, or an expat who continues to receive UK or overseas income, you need a reliable process for converting and recording foreign receipts and expenses.

Rollout timeline and who must prepare

MTD ITSA is being introduced in stages. The important timetable is:

• April 2026 — taxpayers with total income over £50,000
• April 2027 — taxpayers with total income over £30,000
• April 2028 — taxpayers with total income over £20,000

If your taxable income meets these thresholds in the relevant tax year you will need to submit quarterly updates and keep digital records using MTD-compatible software. This includes foreign income: you must record it digitally and convert it to sterling in the way you have chosen and documented.

Key practical obligations for foreign income under MTD ITSA

• Keep digital records of each foreign receipt and expense. Records should show original currency amounts, the exchange rate used, the converted sterling value, date and supporting evidence.
• Use MTD-compatible software that can store original currency and GBP values or use bridging software if you keep digital spreadsheets.
• Submit quarterly updates in sterling totals to HMRC. Quarterly submissions do not replace the year-end reconciliation and final declaration.
• At year-end you will finalise figures (EOPS and final declaration) and claim any foreign tax reliefs or foreign tax credit relief as part of your Self Assessment.

Choosing an exchange rate method — be practical and consistent

HMRC does not force a single exchange-rate method for all taxpayers, but they expect a sensible, consistent approach supported by evidence. Your main options are:

• Spot (transaction) rate: use the bank or card rate on the date you received or paid the money. This is sensible where you have clear bank records per transaction.
• Daily rate: use the published spot rate for the specific day if your bank rate is not available.
• Average rate: where you receive frequent similar receipts (for example monthly rents in one currency), using a monthly or annual average rate can be acceptable — but you must apply it consistently and evidence the calculation.
• HMRC published rates: HMRC publishes exchange rates which many taxpayers use for simplicity and defensibility. These are acceptable if used consistently.

Choose one method for each type of income (trading, rental, capital disposals) and document your policy in writing. Changing method mid-year is possible but you should note the reason and preserve supporting calculations.

How to record foreign income in your digital system

Make sure your accounting software or digital system stores all of the following for each foreign transaction:

• Date of transaction (or date of receipt/payment)
• Original currency code (e.g. EUR, USD)
• Amount in original currency
• Exchange rate used (and where it came from — bank, HMRC table, FX provider)
• Converted sterling value
• Category (trading income, rent, interest, expense type)
• Supporting evidence (invoice, bank statement, receipt) linked or referenced

Many MTD-compatible systems can hold multi-currency transactions and calculate the converted GBP value automatically. If you use spreadsheets, your bridging software must create the digital record in a compatible way for HMRC submissions.

Quarterly updates vs year-end finalisation: what to include and when

Under MTD ITSA you’ll send four quarterly updates each tax year. These quarterly returns summarise totals by income and expense type in GBP. They are not expected to show every detail of foreign tax credits or complex reliefs — those are normally reported and reconciled at the year-end final declaration.

• Quarterly updates: provide totals (in sterling) of income and expenses. Keep the underlying foreign-currency records to support the figures.
• Year-end finalisation (EOPS & final declaration): submit your final taxable profit and any claims for double taxation relief, foreign tax credits, and exchange gains or losses included in your accounts.

Foreign tax credits and double taxation relief — practical notes

If you pay tax abroad on the same income that is taxable in the UK you can usually claim relief to avoid double taxation. Practical points:

• Keep evidence of foreign tax paid (official tax receipts or tax authority statements) and record the GBP equivalent of that foreign tax when you pay it.
• Under MTD you will record totals through the year. The detailed computation for foreign tax credit relief is usually part of the year-end Self Assessment rather than each quarterly update.
• Relief is generally limited to the lower of the foreign tax paid (in GBP) and the UK tax attributable to the same income. Keep calculations showing how you arrived at the claim.

Exchange gains and losses — are they taxable?

Exchange gains or losses arise when the value in sterling of foreign-currency assets or liabilities changes between dates. How they are treated depends on the context:

• Trading receipts and expenses — exchange differences are part of your trading profit or loss. If you receive sales in EUR and the GBP value differs when realised, that gain or loss will usually flow through the trading result.
• Rental income — currency differences affecting rental receipts or expenses will usually affect net income from the property and therefore taxable profit.
• Capital disposals — for disposals in foreign currency, convert at the appropriate dates (purchase and disposal dates) and calculate capital gains in GBP. Exchange differences related to capital items sit within capital gains.

Record exchange differences clearly in your accounts and retain calculations showing the rate used and how the gain or loss was computed.

Practical examples

Example 1 — freelance designer paid €2,000 on 15 October:

• Record original €2,000 on 15 October.
• Use your chosen rate (e.g. bank spot rate on 15 October) and record the GBP equivalent, the rate, and the bank statement showing the receipt.
• Include the GBP value in your quarterly totals under sales.

Example 2 — landlord receives US$3,000 rent monthly and uses an annual average:

• Record each month in original currency and tag it as rent income.
• If you legitimately use an annual average rate for identical recurring receipts, calculate the average at year end, apply consistently, and document the method.
• Keep bank statements and any FX fees that apply — FX costs are allowable expenses.

Software and systems — what to look for

When selecting MTD-compatible software for foreign income, look for these features:

• Multi-currency support: store original currency amounts and the corresponding GBP value.
• Custom exchange-rate options: ability to use spot, daily, monthly or manual rates and to record the source of the rate.
• Audit trail and attachments: link invoices and bank statements to transactions and retain a clear audit trail for HMRC checks.
• Bridging capability: if you use spreadsheets, ensure you have reliable bridging software to submit required data to HMRC.
• Year-end reconciliation tools: support for finalising EOPS and including foreign tax credits and double taxation relief calculations in the final declaration.

Not all accounting packages are equal on multi-currency handling. Test the workflow for your typical transactions before committing — especially if you operate in several currencies.

Common mistakes and how to avoid them

• Failing to record the rate and source — always note where the exchange rate came from (bank, HMRC table, FX provider).
• Mixing methods without documentation — be consistent and record any changes with a rationale.
• Only reporting GBP totals without retaining original-currency evidence — HMRC will expect to see source records on inspection.
• Ignoring FX fees — bank or provider charges tied to currency exchange are allowable costs and should be recorded.
• Assuming quarterly submissions remove the need for year-end work — you still need to finalise and reconcile all foreign tax reliefs and FX adjustments.

Records to keep (practical checklist)

• Original invoices and receipts in foreign currency.
• Bank or payment provider statements showing the amounts received or paid and any fees.
• Documented exchange-rate policy and calculations (daily/spot/average) for the year.
• Evidence of foreign tax paid where claiming relief (official receipts translated into GBP with conversion evidence).
• Quarterly update copies and year-end EOPS submissions.

Special considerations for UK expats and those using the remittance basis

If you are non-domiciled and claim the remittance basis, only foreign income and gains remitted to the UK are taxed. That adds complexity to MTD digital records because you must record whether foreign receipts are remitted or retained offshore. Discuss this with your adviser — remittance rules are technical and you must keep clear evidence of movements between accounts and the dates of remittance.

When to get professional help

If you receive material foreign income, pay foreign taxes, or hold multiple currencies, seek tailored advice. A qualified accountant can help you choose an exchange-rate policy, set up software correctly, and prepare robust year-end calculations for double taxation relief. Getting this right early reduces the risk of mistakes, penalties, and costly restatements later.

Practical next steps — a short action plan

• Check whether you fall into the 2026–2028 MTD ITSA thresholds and when the change affects you.
• Choose MTD-compatible software with multi-currency support or a reliable bridging solution.
• Decide on an exchange-rate policy (spot, daily, average, HMRC rates) and document it.
• Begin recording original-currency details, source of rate and converted GBP value for each transaction.
• Keep all supporting evidence and prepare for quarterly updates. Reconcile and finalise at year-end including foreign tax relief claims.

FAQs — quick answers

• Can I use spreadsheets? Yes, but your spreadsheet records must be part of a digital system that can submit to HMRC. Many people use bridging software to connect spreadsheets to MTD submissions.
• Do I need to convert every transaction? Yes — quarterly submissions and the final year-end return must be in GBP. Keep original-currency records alongside the converted amounts.
• Which exchange rate should I use? Any sensible, consistent method is acceptable. HMRC published rates are a defensible choice. The key is consistency and evidence.

Final reassurance

MTD ITSA brings practical changes to how foreign income is recorded and reported, but you can prepare now to make it manageable. Use MTD-compatible software, keep clear evidence of conversion rates and sources, and document your approach. If this feels complex, we can help you set up systems, choose software, and prepare your quarterly and year-end submissions so you remain compliant and confident.

Tax Digital makes compliance easy. We take the stress away.