The single most misunderstood point in property tax is what happens when you refinance a BRRR project. Investors panic that pulling money out will trigger a tax bill. It does not — and understanding why is the key to the whole strategy.
Refinancing is borrowing, not selling
In the worked example, a £140,000 terrace plus £30,000 of works is refinanced at a £200,000 valuation, releasing £150,000. That £150,000 is a loan secured against the property — not proceeds from a sale — so there is no disposal and no Capital Gains Tax. The CGT on refinance line is a clean £0. You have recycled your capital tax-free and still own the asset.
When the tax actually arrives
CGT only lands when you genuinely sell. The good news: the £24,000 capital portion of your refurb is added to your base cost at that point, shrinking the taxable gain — the same base-cost mechanism explained on the buy-to-let CGT guide.
Capital vs revenue: split it correctly
Not every pound of refurbishment is treated the same. Improvements (a new extension, a first fitted kitchen) are capital and go against your future gain. Repairs and like-for-like replacements are revenue and deduct against rental income once let. Getting this split right is where a good accountant earns their fee.
VAT, and the trading trap
Most refurb work carries 20% VAT, but a reduced 5% rate can apply to homes empty for 2+ years or works that change the number of dwellings. And beware intention: if HMRC judges you meant to sell rather than hold, your profit is taxed as trading income — exactly like a development or flip — not as a capital gain. A genuine buy-refurb-refinance-and-hold is an investment; a quick buy-refurb-sell is a trade.
Once let, you are back in BTL territory
After refinancing and letting, the property is taxed like any other mortgaged rental — which means Section 24 applies to the interest. The refinance was tax-free; the ongoing rental profit is not.