Strategy
BRRR in the UK: how it works, with real numbers
The short version: BRRR means buy, refurbish, refinance, rent. You add value with works, then refinance at the new value to take most of your cash back out. It only works if three things hold: the surveyor agrees the new value, a lender will refinance once you have owned it long enough, and the rent covers the bigger mortgage with room to spare.
The four steps
- Buy below what the property will be worth after works, usually with cash or a bridging loan, because many mainstream lenders will not lend on a home that cannot be lived in.
- Refurbish to a standard that a surveyor will value and a tenant will pay for. Kitchens, bathrooms, heating and layout changes add the most value.
- Refinance on a buy-to-let mortgage at the new value. The new loan repays the purchase finance, and what is left comes back to you.
- Rent it out. The rent has to cover the new mortgage, running costs and empty months.
A worked example
Take a £95,000 terrace with a £20,000 refurbishment, valued at £140,000 afterwards and let at £900 a month. You put in £53,000, including £4,750 stamp duty, £2,500 of legal costs and a 10% contingency on the works. A 75% refinance at £140,000 releases £33,750, so £19,250 stays in. After a 25% running-cost allowance and 5.5% interest, the rent leaves about £2,325 a year, a 12.1% return on the cash left in, before tax.
If the valuation came back at £125,000, £30,500 would stay in. The smaller loan costs less interest, but the return on your cash still drops to about 9.7%, and you would need £11,250 more to do the next deal. That gap is why the valuation evidence matters more than any other number in a BRRR deal. Try your own numbers in the BRRR calculator.
The six-month rule
Most mainstream lenders will not offer a mortgage on a property you have owned for less than six months. It comes from lender policy rather than law, but it shapes almost every BRRR plan: expect to carry your purchase finance for at least six months, whatever the works take. Some specialist lenders will refinance sooner, and refurbishment-to-let products combine a short works loan with a buy-to-let mortgage agreed upfront. These usually cost more, so price that in.
The lender’s stress test
The rent decides how much you can borrow as much as the valuation does. Under the Bank of England’s buy-to-let rules, lenders test affordability at a rate of at least 5.5% unless the mortgage is fixed for five years or more. Most then want the rent to cover that interest by 125% for basic-rate taxpayers and limited companies, and 145% for higher-rate taxpayers. A great valuation with a weak rent can still mean a smaller loan and more cash left in.
Costs people forget
- Stamp duty at the additional-property rate: 5% of the price on top of the standard bands in England and Northern Ireland. Work it out here.
- Bridging finance: usually priced monthly, often with arrangement and exit fees, and more expensive than a buy-to-let mortgage.
- Two sets of fees: legal, valuation and broker costs on the purchase and again on the refinance.
- Holding costs during works: council tax, insurance for an empty property, utilities and security.
- Compliance before letting: gas and electrical safety certificates, an EPC, and any local licence.
Tax, briefly
If you own the property personally, you cannot deduct mortgage interest from your rental income; you get a tax credit at 20% of it instead, rising to 22% from April 2027. From 6 April 2027, property income in England, Wales and Northern Ireland will be taxed at its own rates of 22%, 42% and 47%, two points above the rates on other income, according to GOV.UK. Companies can deduct interest but pay corporation tax, and tax again on money paid out. This is the area where a qualified tax adviser earns their fee.
What goes wrong, and how to check for it
| Risk | What it does | How to check |
|---|---|---|
| The valuation comes in low | Less cash comes back, so more stays in the deal. | Find three sold prices for similar homes on the same street or estate, after renovation, from the last 12 months. |
| Works overrun on cost or time | More cash in, and more months of bridging interest. | Get a written quote with a schedule of works, and keep a contingency of at least 10%. |
| Rates rise before you refinance | A smaller loan passes the stress test, and the rent covers less. | Run the calculator at a rate one or two points above today’s. |
| The rent is lower than expected | The lender may cap the loan, and your income falls. | Compare with homes actually let nearby, not asking rents. |
| You cannot refinance at all | You are left on short-term finance, or have to sell. | Speak to a broker before you buy about which lenders will refinance and when. |
Questions to ask a sourcer about a BRRR deal
- Which sold comparables support the value after works, and when did they sell?
- Who priced the works, and can I see the quote or schedule of works?
- What rent do similar refurbished homes nearby actually let for?
- Which lenders have refinanced similar properties in this area, and after how long?
- What is your fee, when is it payable, and what happens to it if the purchase falls through?
Before you pay any sourcer a fee, run the five compliance checks.
Frequently asked questions
What does BRRR stand for?
Buy, refurbish, refinance, rent. You buy a property that needs work, improve it, refinance on the higher value to take cash back out, then let it. In the US it is often BRRRR, with a final R for repeat.
Can you refinance a property within six months of buying it?
Most mainstream lenders will not lend on a property you have owned for less than six months. This is lender policy, not law. Some specialist lenders will refinance sooner, and some offer refurbishment products that switch to a buy-to-let mortgage once the works are signed off.
Is BRRR still worth it in the UK?
It depends on the deal. Higher interest rates mean the rent has to cover a bigger mortgage payment, so deals that worked at 3% may not work at 5.5% or more. The calculator shows whether the rent still covers the new loan after costs.
Do I pay the stamp duty surcharge on a BRRR purchase?
If you will own more than one home when you buy, or you buy through a company, yes. That adds 5% of the price on top of the standard rates in England and Northern Ireland.
Should I buy BRRR deals personally or through a limited company?
It depends on your income, your plans and how much you will borrow. Individuals cannot deduct mortgage interest from rental income and get a tax credit instead (20% now, 22% from April 2027), while companies can deduct it but pay corporation tax and tax on what they pay out. Ask a qualified tax adviser before you buy.
BRRR deals with the evidence attached
On DealSold every BRRR listing shows the cash left in after refinancing, and labels each figure as verified, third-party or the sourcer’s estimate.
Capital at risk. Property values and rents can go down as well as up.
How we made this guide
Written by the DealSold team. The worked example uses DealSold’s own calculation code with illustrative figures, not a forecast. Tax rates come from GOV.UK and the stress-test figures from the Prudential Regulation Authority’s buy-to-let underwriting standards (supervisory statement SS13/16), all checked on the date shown. General information, not financial, tax or mortgage advice. Our editorial policy.