Allow for exchange rates and lender adjustments
A lender may accept only specified currencies and may reduce the amount used in affordability. We separate regular earnings from allowances or reimbursements and show the bank credits behind the payslips. The mortgage remains payable in sterling.
Make the earnings clear before converting them.
Income in euros, dollars, dirhams or another currency can need more explanation than one converted annual total. A useful income summary shows what is earned, what reaches your account and which parts are likely to continue. Your residence and the income currency are separate lender checks.
Separate the components of pay
List fixed salary, cash allowances, overtime, bonuses, commission and share awards individually. Distinguish a recurring allowance from an expense reimbursement. For shares, record what has vested or been sold and what remains conditional. Avoid counting a single payment both as annual income and as a separate recurring bonus.
Reconcile the documents in their original currency
Start with the employment terms, pay records and matching bank credits. Explain deductions, irregular pay dates and transfers between your accounts. Record gross contractual pay and net receipts separately. A bank credit after tax or conversion is not automatically the gross salary that should be used in an affordability assessment.
Check conversion and the household budget
The lender chooses its accepted currencies, conversion basis and any income adjustments. Its assessment can differ from a currency website’s headline rate. List spending and borrowing in each currency too: overseas housing costs do not disappear because the new mortgage is in sterling. Review the budget after conversion costs and in a weaker exchange-rate scenario.
A simple illustration of currency risk
Suppose 10,000 units of overseas income convert at £0.80 per unit: that is £8,000. At £0.72 per unit, the same income becomes £7,200. A £2,000 mortgage payment stays £2,000, so less sterling remains for other costs. These invented rates illustrate the effect only; they are not live exchange rates, a forecast or a lender affordability calculation.
Turn several income records into one clear explanation
Open each stage to see what needs to be clear. The order and timing depend on your circumstances.
Identify the person and the source
For each borrower, record residence, employer or business location, payment currency and where the work takes place. Sterling pay from abroad still needs its source explained.
Build the pay breakdown
Show regular earnings separately from variable pay and assets. Keep supporting records for each component and identify anything that will end, vest later or depend on future performance.
Match receipts and commitments
Reconcile payslips or distributions with the relevant bank credits. List loans, dependants and housing costs in their original currencies so transfers and conversion do not obscure the budget.
Assess lender policy and resilience
I investigate the relevant country, currency and income rules before comparing suitable borrowing options. We also discuss your ability to maintain sterling payments if income, exchange rates or expenses move against you.
Sources behind this guide
Last checked 13 October 2026. These sources explain the issues to discuss. Published lender policies are examples; current criteria and individual assessment determine the options available.
- NatWest UK: income and packaging
An example of lender-specific currency conversion and income treatment for eligible applications.
- NatWest UK: lending criteria
UK residence, overseas working and employment changes are distinct policy questions. NatWest UK and NatWest International are different routes.
- HSBC UK: application documents
Evidence requirements depend on employment and the type of income being assessed.
How I approach the case
We begin with what you want to achieve, your timescale and any part of the case that needs explaining. I review the evidence and suitable lender routes, then explain the available options and their costs. A recommendation follows the individual assessment; an initial conversation does not commit you to an application.
Where legal, tax or other specialist advice is needed, we identify it early so the finance fits the wider transaction. Tell me about any change in employment, borrowing, deposit or property details before proceeding.
What to prepare
- Income currency and payment history
- Employment contract
- Payslips and corresponding bank credits
- Other currency commitments
You do not need every document before saying hello. Start with a short outline; detailed or sensitive records should follow through an agreed secure route.
A currency moving against sterling can make the payment more expensive in your income currency. No exchange rate is guaranteed.
Your questions, answered
Do all lenders reduce foreign-currency income by the same percentage?
No. Currency acceptance, conversion and income treatment are lender-specific. There is no universal deduction that should be applied to every case. Your adviser needs to use the chosen lender’s current approach and distinguish that from your own household budget.
Can our joint application use two different currencies?
Potentially, depending on the lender and each applicant’s circumstances. Show the two income streams and their evidence separately, including where each person lives and works. Combining them into one sterling estimate should not hide different employment or residency issues.
Does a currency peg remove the risk?
It does not remove your exposure to sterling. Even where your income currency is linked to another currency, the relationship with GBP can move. Your mortgage remains payable under its terms, so the household budget should account for exchange-rate changes.
Does a lender accepting my currency mean it accepts expats?
No. A lender can accept eligible foreign-currency earnings from UK residents while excluding overseas-resident applications. Residence, employment location and currency must all fit the proposed route; checking the currency alone is not enough.
Getting started from overseas
Can the first conversation take place while I am overseas?
Yes. Share your country of residence, preferred time zone and a short outline of the UK property plan. We can arrange the initial discussion remotely and establish what evidence is needed before asking you to organise detailed documents.
Link to this answerWhy do you ask about both residence and nationality?
They describe different parts of the case. The lender also needs to understand the income currency, employment, property use and deposit source. A passport alone does not establish a lending route; the full circumstances and the lender’s current requirements must be checked.
Link to this answerHow should I prepare an overseas deposit?
Keep a clear record of how the funds were accumulated and how they move between accounts. Explain gifts, sale proceeds, company distributions or other material sources early. The lender and solicitor may each require evidence. Agree their requirements before moving money simply for the application.
Link to this answerFurther reading: GOV.UK: proving immigration status · MoneyHelper: mortgages and homebuying. Content updated 13 October 2026. General information; availability depends on the individual case.