UK Property Costs & Taxes Overview: Stamp Duty, Council Tax, Letting Tax, Mortgage, Yield & FX

The real cost of a UK property is never just the asking price. A complete buying decision has to count three kinds of cost: the one-off costs at purchase, the ongoing costs of holding the property, and the tax that comes into play if you later let it out. Many buyers look only at the price and are caught out by everything that follows. The good news is that none of it is mysterious: each cost is knowable and, with the right tools and advice, plannable. What separates a confident purchase from an anxious one is simply having mapped the whole picture before you commit, rather than discovering line items one surprise at a time.

This overview, from IREIS Properties, maps out the full set of costs and taxes you will meet when buying in the UK. For each, we flag what matters and point you to a deeper article — so that you start with a clear ledger in your head.

One-off costs: what you pay at purchase

Beyond the price itself, the common one-off costs at purchase include several items: stamp duty (the largest tax), legal fees (for the transfer of title and legal checks), land registry fees (to register you as the new owner), a valuation fee (the lender’s assessment of the property when you borrow), and the telegraphic transfer fee cross-border buyers use to move funds into the UK. A snagging inspection at completion of a new build is another small cost. Of these, Stamp Duty Land Tax is the most complex — on top of the basic bands, the rules differ for overseas buyers, first-time buyers and additional-property owners, so the figure varies with your situation — the surest route to a precise number is our UK Stamp Duty Calculator for your own circumstances. To understand the costs beyond the headline price in detail, our deep-dive on purchase costs is worth a read before you set your budget, since together these add up to a non-trivial sum on top of the price and are best provided for from the outset rather than found along the way.

Ongoing costs: what you pay every year after buying

Once the property is yours, there are fixed annual costs — the part most often underestimated.

Council Tax is the one to understand first. A property is placed in a band from A to H based on its value at the valuation baseline; the higher the band, the higher the charge. The actual amount is set each year by the local council, so the same band costs different amounts in different boroughs. You can look up a property’s Council Tax band on the government website using its postcode, and you should do so when viewing and budgeting for holding costs.

Who pays? Generally, when someone is living there it falls on the occupier — the owner if owner-occupied, usually the tenant if let. A few common situations are worth knowing: if only one adult lives there, a single-person discount usually applies; if every member of the household is a full-time student, the property is generally exempt; while long-term empty homes and second homes may instead attract an extra premium from some councils. These rules vary by council, so it is best to confirm them before buying.

Beyond Council Tax, holding costs may also include buildings insurance for an owner-occupied house, a fund for routine maintenance and repairs, and — if you let the property through an agent — a letting management fee. Estimate these together to see the true annual burden of holding the property. The more facilities a building has — a concierge, a gym, a pool — the higher the service charge tends to be, so a higher headline price is not the only thing that makes a property more expensive to own year after year.

Flats also carry a service charge and, possibly, ground rent. Both are closely tied to tenure, which we explain in full in our UK property tenure explained guide.

Letting tax: once you become a landlord

If you intend to let the property, you enter the UK’s letting-tax regime, and there are two points every overseas landlord should know.

The first is rental income tax and Section 24. Under Section 24, phased in from 2017, individual landlords can no longer deduct their full mortgage interest as an expense; instead, relief is given as a basic-rate (20%) tax credit. By contrast, a landlord holding through a limited company can in principle still deduct mortgage interest in full. Which structure suits you depends on your own tax position, and the difference can be significant — we recommend consulting a qualified UK tax adviser for the latest rules. The effect is felt most by higher-rate taxpayers, for whom the shift from a full deduction to a basic-rate credit can meaningfully reduce the net return on a mortgaged let. This is one reason some landlords weigh holding through a company — though that route carries its own running costs and considerations, so it is not automatically the better choice.

The second is Capital Gains Tax (CGT) and non-resident reporting. The gain on selling a UK residential property is subject to CGT; for the 2025/26 tax year, the CGT rates for residential property are 18% and 24% (per HMRC). Note especially: a non-resident disposing of UK residential property must report to HMRC and pay within 60 days of completion (NRCGT) — a point often missed. It is also worth knowing that individuals usually have an annual tax-free allowance for gains, and that a property which has genuinely been your only or main home may qualify for relief — but a let investment property does not get that relief on the period it was let. The detail is case-specific, so plan any disposal with an adviser well before you sell. Rates are subject to change; consult a qualified UK tax adviser.

Overseas and non-resident mortgages

Not every buyer pays cash. Overseas and non-resident buyers who need a mortgage should note that most high-street banks favour applicants with UK income, so finance is usually arranged through a specialist lender or broker experienced with non-resident cases. Loan-to-value and rates vary by individual, so a specialist assesses the detail case by case. As a rule of thumb without numbers: overseas buyers should expect a lender to ask for a larger deposit than a UK-resident owner-occupier would, to require more documentation, and to offer a narrower range of products. Getting a mortgage in principle early, and working with a broker who places non-resident cases regularly, removes much of the friction.

Rental yield

When assessing letting returns, the common measure is the yield — rent as a proportion of the price. You can use our rental yield calculator to work it out on your own figures. A useful discipline is to look at the net yield — after Council Tax (where you pay it), service charge, management fees, insurance and any periods without a tenant — rather than the headline gross figure, which always flatters. Please note: all yield figures are approximate and subject to market conditions, and are not a guaranteed return.

Currency exchange: leave the timing to professionals

Buying across borders inevitably means converting home-country funds into pounds. The timing and cost of that exchange are a commercial decision, not a bet that can be predicted. Our advice is consistent: consult a specialist FX broker to monitor the rate and, where possible, lock in a forward contract ahead of completion to manage the cost of exchange. For a large purchase, even a modest movement in the exchange rate can change the all-in cost by a meaningful sum, which is exactly why this is a decision to plan deliberately rather than leave to chance on completion day. Keep every exchange receipt, too — it forms part of the source-of-funds file your solicitor will need.

Get the whole ledger clear before you talk returns

The price is only the start. Only when you have counted the one-off costs, the annual holding costs and the letting tax — together with mortgage and currency — do you see the true picture of a UK purchase and the room for return. A simple habit serves overseas buyers well: build a modest buffer into your budget for the costs that are estimated rather than fixed, so that the final completion statement holds no surprises. The London-based, tri-lingual advisory team at IREIS Properties can map the cost structure for you at every step and introduce qualified solicitors, tax advisers and mortgage specialists where needed. Read next: our complete process for overseas buyers, our complete guide to buying for your children, and our Tax & Legal section.