Buying a property already comes with plenty of expenses — from deposits and solicitor fees to surveys and moving costs. One of the biggest extra costs is Stamp Duty Land Tax (SDLT).
A common question homebuyers ask is:
“Can I add stamp duty to my mortgage?”
The answer is: not directly, but there are ways to structure your mortgage or finances to help cover it.
In this detailed guide, we’ll explain how stamp duty works, whether you can roll it into your mortgage, and what smart options exist if you’re short on funds at completion.
🏠 What Is Stamp Duty Land Tax (SDLT)?
Stamp Duty Land Tax is a government tax you pay when buying property or land in England or Northern Ireland. (Scotland and Wales have their own systems — Land and Buildings Transaction Tax and Land Transaction Tax respectively.)
You pay SDLT based on the purchase price of the property, and the rate increases as the price rises.
Here’s the current Stamp Duty rate structure (as of 2025):
| Property Price | Stamp Duty Rate |
|---|---|
| Up to £250,000 | 0% |
| £250,001–£925,000 | 5% |
| £925,001–£1.5 million | 10% |
| Over £1.5 million | 12% |
For first-time buyers, the first £425,000 of the purchase price is tax-free (if the property costs £625,000 or less).
If you’re buying an additional property (like a buy-to-let or second home), you pay a 3% surcharge on top of the standard rates.
💡 How Stamp Duty Is Paid
Stamp Duty must be paid within 14 days of completion.
Usually, your conveyancer or solicitor handles this for you — they’ll calculate the exact amount, include it in your completion statement, and pay HMRC on your behalf.
This means you can’t simply “delay” paying it, or use your lender’s mortgage funds to do so. The tax is due immediately at completion, before you legally own the property.
🏦 So, Can You Add Stamp Duty to a Mortgage?
Technically, you can’t directly add stamp duty to your mortgage — lenders won’t include it as part of the loan amount.
However, there are indirect ways to fund your stamp duty through mortgage planning:
1. Borrow More Than the Property Price (If Allowed)
If your loan-to-value (LTV) ratio allows it, you might be able to borrow slightly more to free up personal cash for stamp duty.
For example:
- Property price: £300,000
- Deposit: £60,000
- Mortgage: £240,000 (80% LTV)
If your lender is comfortable going to 85% LTV, you could borrow £255,000 instead, leaving £15,000 of your savings to cover stamp duty and fees.
This isn’t “adding stamp duty to your mortgage” in a literal sense, but it achieves the same effect.
2. Use a Further Advance or Remortgage Later
If you’ve already bought your home and want to recover the money spent on stamp duty, you could apply for a further advance or remortgage once your property has increased in value.
This lets you release equity to cover the funds you initially used for stamp duty.
3. Take Out a Personal Loan or 0% Credit Option
Some buyers choose to use a personal loan to pay the stamp duty, repaying it over a few years.
However, this increases your overall debt — and your mortgage lender will factor it into your affordability checks.
⚠️ Why Lenders Don’t Add Stamp Duty to the Mortgage
Lenders are focused on the value of the property as security for the loan.
They will only lend based on a percentage of that property’s purchase price or valuation (whichever is lower).
Since stamp duty doesn’t add to the property’s value, lenders won’t include it in the loan amount.
It’s classed as a transactional cost, not part of the mortgageable asset.
Allowing borrowers to finance stamp duty directly would increase the loan-to-value ratio beyond acceptable risk levels.
💰 Example: Calculating Total Costs
Let’s take an example:
Purchase price: £400,000
Deposit: 10% (£40,000)
Mortgage: £360,000
Stamp duty (on £400,000): £7,500
Even though you’re paying £407,500 total, the lender will still base the loan only on the £400,000 property value — not the extra costs.
You’d need to have the £7,500 available at completion.
🧾 Can First-Time Buyers Avoid Stamp Duty?
Yes — first-time buyers benefit from generous reliefs:
- No stamp duty on the first £425,000
- 5% on the portion between £425,001 and £625,000
So if you buy your first home for £400,000, you pay £0 in stamp duty.
But if you buy for £500,000, you pay 5% on the £75,000 difference = £3,750.
If the property is over £625,000, the standard rates apply in full.
🏘️ What About Buy-to-Let or Second Homes?
If you’re purchasing a second home, investment property, or buy-to-let, you must pay a 3% surcharge on the entire purchase price.
Example:
Purchase price: £300,000
Standard rate: 0% (first £250k), 5% (next £50k)
Base SDLT = £2,500
Plus 3% surcharge: £9,000
Total = £11,500
This surcharge applies even if the property is a holiday home or owned jointly with others.
🔄 Can You Use a Bridging Loan to Cover Stamp Duty?
In some situations, yes.
If you’re in a chain or need to buy before selling your existing home, a bridging loan can help you cover costs like stamp duty temporarily.
Once your old property sells, you repay the bridging loan in full.
However, bridging finance typically has higher interest rates, so it’s best used for short-term scenarios.
💡 Tips to Manage Stamp Duty Costs
- Budget early – Factor stamp duty in from the beginning, not as an afterthought.
- Check if you qualify for reliefs – First-time buyers or shared-ownership purchases can reduce or defer payments.
- Use savings strategically – Some buyers temporarily reduce their deposit size slightly to free funds for stamp duty.
- Consult a broker – A broker can calculate optimal LTVs or alternative lenders if you need flexibility.
- Consider long-term affordability – Don’t over-stretch finances just to roll in short-term costs.
🧮 How a Mortgage Broker Can Help
A good mortgage broker can structure your mortgage to help with overall affordability, including:
- Advising on LTV limits and flexible lenders
- Identifying options to borrow slightly more if possible
- Recommending remortgage or second-charge strategies to recover funds later
- Explaining stamp duty exemptions for certain buyers (e.g., first-time, shared-ownership, multiple dwellings)
At Everest Mortgages, we help you plan your full home-buying budget — not just your monthly repayments.
We’ll make sure there are no hidden surprises when it comes to completion day.
💬 Common FAQs
Can I pay stamp duty after completion?
No. It must be paid within 14 days of completion, or you risk fines and interest.
Can I use a credit card to pay stamp duty?
No — HMRC doesn’t accept credit card payments for stamp duty.
Can my solicitor delay paying stamp duty?
No. They are legally required to submit the SDLT return and payment promptly.
Is stamp duty tax-deductible for landlords?
No, but it can be used to reduce capital gains tax when you eventually sell the property.
🧭 Key Takeaway
While you can’t directly “add” stamp duty to your mortgage, you can structure your borrowing or use smart finance planning to ease the burden.
The key is to plan ahead — calculate your full costs early, explore lender flexibility, and use a trusted mortgage broker to help you find the right balance between deposit, borrowing, and upfront taxes.
📞 Speak to Everest Mortgages
At Everest-Mortgages.co.uk, we guide buyers through the full cost of property ownership — from deposits to stamp duty to monthly repayments.
Our experts can help you:
- Understand your total buying costs
- Explore flexible borrowing options
- Find lenders who suit your budget and property goals
📧 info@everest-mortgages.co.uk
🌐 Everest-Mortgages.co.uk
💬 Speak to a mortgage expert today and make your home purchase simpler, faster, and fully prepared.
