If you’re buying UK property from abroad, it might seem easiest to go straight to an international bank and accept their mortgage offer. But that’s not always the best move.
More experienced investors compare multiple loan options before making a decision.
The good news is it doesn’t take long, and a small amount of time now can have a big impact on your cash flow for the next 25 to 30 years.
In this article, we cover loan terms, repayment structures, interest types, and what to do when the right mortgage isn’t ready.
How to decide which mortgage is best?
Before you start looking at lenders or rates, it’s helpful to understand the main factors that affect every mortgage you’ll compare.
Here are the main factors to consider when comparing mortgage options:
- Loan term: This is how long your mortgage will last.
- Interest rate: The yearly cost of borrowing, shown as a percentage.
- Repayment method: This refers to whether you pay back the loan each month or just the interest.
- Deal period: The set time, often 2, 5, or 10 years, during which your interest rate stays the same.
- Loan-to-value (LTV) ratio: This is the percentage of the property’s value that you’re borrowing. A lower LTV means less risk for the lender and often a better rate for you.
- Additional fees: These are upfront costs that can vary widely by lender, like arrangement fees and early repayment charges (ERCs).
None of these factors stands alone. For example, a low interest rate might end up costing more if the arrangement fee is high. A shorter deal period gives you flexibility but may mean your rate changes sooner.
Small differences can cost you your long-term cash flow, so take time to consider each factor.
How long should my mortgage term be?
The length of your mortgage term usually depends on your age and affordability, and your monthly payment and total interest paid are directly tied to this choice:
Longer terms (25–30 years) keep your monthly payments lower, which helps with cash flow, especially if you’re juggling multiple properties or running a tight budget. The trade-off is you’ll pay more interest over time and build equity more slowly.
Shorter terms (15–20 years) cost more each month, but you’ll pay off the loan faster and save on interest. You also build equity more quickly. However, you have less flexibility if your rental income dips or exchange rates move against you.
For most buy-to-let investors, the mortgage term is 25 to 30 years. It balances monthly affordability with a realistic exit.
If your goal is to own the property outright as a long-term buy-to-let asset, a shorter term can make sense if the rental income supports the higher repayments.
Which is better, repayment or interest only?
Interest-only is the standard for buy-to-let. Most lenders expect it, and most overseas investors prefer it.
Lower monthly payments mean the rental income is more likely to cover the mortgage, which helps you pass the lender's affordability test (known as the Interest Coverage Ratio, or ICR).
Repayment makes sense if your goal is to own the property outright by a certain date, e.g. before retirement.
It reduces long-term risk, eliminates the need for a capital repayment plan at the end of the term, and steadily builds equity. The trade-off is a higher monthly commitment.
Here's how the two structures compare:
Some investors split the difference: most of their portfolio on interest-only for cash flow, with one or two properties on repayment to build a debt-free core over time.
Note: If you choose interest-only, lenders will require a credible exit strategy, usually a sale of the property or a refinance. Have this documented before you apply.
Which is better, fixed or variable rate?
For non-UK residents, fixed rates are almost always the sensible choice.
Here's why: your mortgage payments are in pounds. If your income is in another currency, e.g., Hong Kong dollars, UAE dirhams, or Singapore dollars, exchange rate movements can significantly change the real cost of your repayments.
Variable rates make sense if you need flexibility or plan to exit soon. However, you’re trading payment certainty for swings in rates and currencies.
Here's how fixed and variable rates compare:
How long should I fix my rate for: 2, 5, or 10 years?
Once you've decided on a fixed rate, you need to choose the deal period, or how long to lock in. The most common options are 2, 5, and 10 years.
A 2-year fix offers flexibility. You can remortgage sooner if rates fall, avoiding being locked in. The trade-off is facing a new rate in two years, which could be higher.
A 5-year fix is the most common for buy-to-let. It gives you stability without locking you in for too long. This is ideal for medium-term holds.
A 10-year fix suits investors who want long-term certainty and don’t plan to sell or refinance. Rates are usually higher, and exiting early can be costly.
Tip: If you're planning to sell or refinance within 3 years, check the ERC schedule carefully before fixing for five. Some lenders charge 3-5% of the outstanding balance if you exit during the fixed period.
What LTV ratio should you aim for?
For non-residents, LTV does more than determine your deposit size. It shapes your rates, lender options, and likelihood of mortgage approval.
Typically:
- 60-65% LTV: Access to better rates and a wider lender pool. Less leverage, but more flexibility and lower cost.
- 70-75% LTV: The most common range for non-UK residents. Balances leverage with cost and approval likelihood.
- 80%+ LTV: Very limited options for overseas buyers. Higher rates, stricter criteria, and frequent declines.
This matters because LTV affects your ability to pass the ICR stress test, reducing your lender options. Higher LTV increases interest costs, making it harder for rental income to meet the ~145% coverage for non-residents.
That’s why experienced investors don’t simply maximise LTV. They optimise for affordability, stronger cash flow after financing, and refinancing flexibility.
As a rule of thumb, lower LTV means better rates, healthier cash flow, and an easier refinance.
What costs are in a mortgage?
The headline rate is only part of the cost. When comparing mortgages, always assess the true cost of borrowing, including these additional fees:
For non-UK residents, add the 2% Stamp Duty Land Tax surcharge to the standard SDLT rates. On a £350,000 property, that's an extra £7,000 to factor into your upfront costs.
But it doesn’t stop there. The way your mortgage is priced also matters.
For example, a 0.3% lower rate with a £2,000 fee can still cost more over a 2-year deal than a slightly higher rate with a smaller fee - especially if you refinance early.
Tip: Use comparison tools like Compare the Market to help you look at everything together - rates, fees, taxes, and how long you expect to keep the loan.
What happens if the right mortgage isn’t ready when I need it?
You’ve done the work. You’ve found the right mortgage, but timing doesn’t always align.
For overseas buyers, mortgage declines and delays are common. The risk isn’t just waiting; it’s being pushed into a decision under pressure.
A bridging loan solves for timing. It lets you secure the property now and refinance later, so you don’t compromise on your long-term financing.
For example, a Ghana-based couple had exchanged on a Birmingham property but faced last-minute mortgage delays due to extra overseas checks. They secured a bridging loan within 24 hours, completed it in 13 days, and later refinanced into a buy-to-let mortgage.
GoGoProp offers bridging finance for overseas buyers investing in UK residential buy-to-let: rates from 1% per month, up to 65% LTV, 3–12 month terms, with approval in 24 hours and funding in as little as 10 days.
Need to secure your buy-to-let property fast while you line up the right mortgage? Contact the GoGoProp team today.
Key takeaways
- Assess loan term, deal period, repayment method, interest rate type, LTV, and total fees including ERCs when comparing mortgages.
- Longer terms (25-30 years) reduce monthly payments but cost more in total interest; shorter terms build equity faster but stretch monthly cash flow.
- Interest-only is the standard for buy-to-let and keeps monthly costs lower, but requires a clear exit strategy.
- Fixed rates are almost always the right choice for non-residents managing currency risk.
- 5-year fixed deals offer the best balance of stability and flexibility for most investors.
- Always calculate the true cost of borrowing, not just the headline interest rate.
Frequently asked questions
1. What is the easiest mortgage type for non-UK residents to access?
Buy-to-let mortgages are the easiest for non-UK residents. Lenders base affordability on rental income rather than UK earnings, making them accessible even without a UK payslip or credit history.
2. How much deposit do I need as a non-UK resident?
Deposits are typically 25-40%, depending on profile, property, and location. Higher deposits reduce LTV, which improves rates and expands lender options.
3. Is a fixed or variable rate better for overseas buyers?
Fixed rates suit most overseas buyers as they provide payment stability and reduce exposure to currency fluctuations when income is in another currency.
4. What is the difference between a 2-year and a 5-year fixed deal?
A 2-year fix offers flexibility to refinance sooner, while a 5-year fix provides longer stability. Choice depends on your hold period and risk preference, but check early repayment charges.
5. What can I do if my mortgage isn't approved before my completion deadline?
If approval doesn’t come before completion, a bridging loan can fund the purchase quickly while the mortgage is arranged, then be repaid once long-term financing is completed. Contact GoGoProp if you need a bridging loan in 10 days.
