Are House Prices Going Down? A Landlord Tax Guide

If you own a rental property, "are house prices going down?" usually isn't an idle question. You're trying to decide whether to buy more, sell up, or sit tight, and the price chart feels like the thing that decides it for you.

Here's the honest answer up front. Nobody, including us, can tell you where prices go next, and we won't pretend otherwise. What we can do is give you the one official number worth watching, then focus on the part that's genuinely in your control: the tax you pay when you buy, hold, or sell.

This guide is for UK landlords weighing a move. We'll keep the market-reading short and spend the time where it actually changes your numbers.

Are UK house prices going up or down right now?

The reliable place to look is the official UK House Price Index, published on gov.uk and built from actual completed sales recorded by HM Land Registry and the equivalent bodies in Scotland and Northern Ireland. It's slower than the lender or portal headlines, but it's the real transaction data rather than asking prices or a single lender's book.

If you want the current figure, read the latest monthly UK HPI summary directly. It moves month to month, and a single reading rarely justifies a big decision on its own. Treat it as a trend gauge, not a crystal ball.

What we'd gently push back on is the forecast industry. You'll see confident five-year regional predictions everywhere. They're educated guesses, they get revised constantly, and they've been wrong before. We won't repeat them here as if they were settled fact, because they aren't.

Should I time the market or the tax?

Most landlords spend their energy trying to time the market. In practice, the tax position is the part you can actually plan around, and getting it right often matters more to your net return than guessing the next 2% of price movement.

The mistake we see most often is selling in the same tax year as another big gain, or selling without using a spouse's allowance, and handing over thousands that a little planning would have saved. Prices you can't control. Timing a disposal, splitting ownership, and using your reliefs you can.

So before you watch the index, get clear on three things: your capital gains tax position, who legally owns the property, and which tax year a sale would land in.

What tax do I pay when I sell a rental property?

When you sell a buy-to-let or second property at a profit, you pay Capital Gains Tax (CGT) on the gain, not the sale price. The gain is roughly the sale proceeds minus what you paid, minus buying and selling costs and qualifying improvements.

Two figures matter most for 2025/26.

The annual exempt amount, the slice of gains you can make tax-free, is £3,000 for individuals in 2025/26. After that, residential property gains are taxed at 18% within your remaining basic-rate band and 24% on anything above it.

There's also a deadline that catches people out. If you sell UK residential property at a gain, you must report it and pay the CGT due within 60 days of completion using HMRC's online property account. Miss it and you can face interest and a penalty, so it's worth lining up before you exchange.

If you're selling because you're winding down a property business, ask whether Business Asset Disposal Relief could apply. Where it does, the rate is 14% for 2025/26. It's narrower than many landlords assume, so check eligibility properly rather than banking on it.

Illustrative example: selling a buy-to-let in 2025/26

Illustrative example. Meet Daniel, a higher-rate taxpayer selling a rental flat he owns in his sole name. These figures are made up to show the method, not a prediction of any real sale.

Daniel's numbers:

• Sale proceeds: £260,000
• Original purchase price plus buying and selling costs: £200,000
• Gain: £60,000

Now apply 2025/26 reliefs and rates. He deducts the £3,000 annual exempt amount, leaving a taxable gain of £57,000. As a higher-rate taxpayer with the gain sitting above his basic-rate band, it's taxed at 24%.

£57,000 x 24% = £13,680 of CGT due, reportable and payable within 60 days of completion.

Here's the planning point. If Daniel owned the flat jointly with a spouse, two annual exempt amounts (£3,000 each, so £6,000) would apply, and part of the gain might fall into a lower-rate band depending on the other partner's income. The price he sells at is the market's call. How the gain is owned and timed is his.

What does a falling market mean for landlords?

A softer market isn't automatically bad news for a landlord, and a rising one isn't automatically good. It depends on what you're trying to do.

If you're holding, day-to-day price moves don't change much. Your return comes mostly from rent, and your tax planning centres on income, allowable expenses, and how the property is owned, not on this month's index reading.

If you're buying, lower prices can mean a better entry point and a stronger yield, assuming rental demand holds up. The tax to model here is the Stamp Duty Land Tax on a second property and your ongoing income tax position on the rent.

If you're selling, a quieter market often pushes people to rush. Don't let the headline rush the tax. The 60-day CGT reporting clock, your annual exempt amount, and which tax year completion falls in can all swing your net proceeds by thousands.

Prices will do what they do. The reliefs, deadlines and ownership choices are where an accountant earns their keep, and where we can usually find money that the market never offered you in the first place.

Thinking about buying or selling a rental property? Before you act on a price chart, get the tax modelled properly. Book a call with a Zmartly tax adviser and we'll work out the real net position for your situation. You can also run a quick estimate with our capital gains tax calculator, and see how we support landlords day to day.

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