If you’re planning to buy a property, one of the first and most important questions you’ll likely ask is: how much will I repay? From mortgage interest to stamp duty and monthly outgoings, understanding the full picture of your financial commitment is essential for confident decision-making.
At Signature, we believe mortgage advice should be clear, tailored, and practical. So, whether you’re a first-time buyer or expanding your portfolio, here’s what you need to consider when working out how much you’ll repay.
Mortgage Repayments: What They Include
Your monthly mortgage repayment usually covers two components:
- Capital: The amount you borrowed
- Interest: The charge applied by your lender for borrowing the money
The exact amount you’ll repay each month depends on:
- The loan size
- Your interest rate
- The loan term (usually 25–35 years)
- Whether you’ve chosen a fixed-rate, tracker, or variable-rate mortgage
You can use a mortgage calculator or speak to a broker to get a clear estimate tailored to your circumstances.
How Interest Rates Affect What You Repay
Even a small difference in interest rate can significantly affect how much you repay over time. For example, borrowing £200,000 over 25 years at 5% interest could cost around £1,170 per month, while the same loan at 4% would reduce your monthly payments to £1,055.
As of mid-2025, interest rates are gradually falling after recent highs. That means this may be a great time to lock in a more favourable deal, especially for first-time buyers and remortgagers.
Don’t Forget Stamp Duty
Stamp Duty Land Tax (SDLT) is a one-off cost you’ll need to factor into your budget when buying a property in England or Northern Ireland.
From April 2025, the standard residential rates are:
- Up to £125,000 – 0%
- £125,001 to £250,000 – 2%
- £250,001 to £925,000 – 5%
- £925,001 to £1.5 million – 10%
- Above £1.5 million – 12%
First-time buyers benefit from discounted rates:
- No SDLT on homes up to £300,000
- 5% on the portion from £300,001 to £500,000
If you’re purchasing an additional property (like a buy-to-let), an extra 5% surcharge applies.
We’ll help you work out exactly how much stamp duty you’ll pay and how it affects your total budget.
Budget Planning: What Can You Afford?
When asking “how much will I repay?”, it’s not just about the mortgage. You’ll also need to consider:
- Deposit amount: Typically 5% to 20% of the property price
- Legal and conveyancing fees
- Valuation and survey costs
- Broker or arrangement fees
- Ongoing costs: Like council tax, insurance, and maintenance
It’s crucial to factor in all these expenses when calculating what you can truly afford, not just now, but sustainably over the life of your loan.
Fixed or Variable? Choosing the Right Repayment Type
Depending on your financial goals, you may choose:
- A repayment mortgage, where you pay off both capital and interest each month
- An interest-only mortgage, where you repay just the interest during the term and settle the capital at the end (often used by landlords or investors)
We’ll help you determine which type suits your needs—and how it affects your total repayment figure.
Ready to Plan Your Purchase?
Whether you’re just starting out or ready to move, knowing how much you’ll repay is a critical first step. Let our advisers guide you through the numbers with clarity and confidence.
At Signature, we work closely with a wide network of lenders to give you:
- Accurate mortgage affordability assessments
- Access to exclusive broker-only mortgage deals
- Tailored repayment breakdowns based on your deposit, goals, and credit profile
- Expert insight on stamp duty, tax implications, and long-term financial planning
Get in touch with Signature today for personalised advice, and take the guesswork out of your next move.
