What this page is based on
Trust and data notes
- ReviewedUpdated for 2026 where the property tax rules and planning ranges on this £400,000 page have been reviewed for budgeting use.
- How to read the figuresOfficial charges and estimate-led costs are shown separately so buyers can see which parts of the total are fixed rules and which parts are planning ranges.
- When to double-checkFigures are guidance only. Buyers should check important numbers with their solicitor, lender or the relevant official authority before making financial decisions.
- Source styleThis page includes official-rate references and linked source notes where applicable.
Official reference points used on this page include HMRC SDLT residential property rates and Revenue Scotland LBTT residential rates and bands.
At a glance
Key facts buyers should know first
Typical total upfront cash needed
About £45,000–£65,000+ on a £400,000 purchase, depending on deposit size, buyer type, tax treatment and moving assumptions.
Example 10% deposit
A 10% deposit is £40,000 before legal fees, surveys, mortgage costs and moving are added.
Best fit
Useful for first-time buyers, home movers and buyers comparing how a £400,000 budget changes across the UK.
Buyers should check
Property tax treatment, survey scope, mortgage charges, moving costs and whether the property is simple or more complex.
Trust note
Official-rate items vs estimate-led items
TrueHomeCosts separates published rates from market-based assumptions so buyers can see which figures are official and which ones are planning estimates.
Official or published-reference items
- property tax for the relevant UK nation
- published registration fee scales where applicable
Estimate-led items
- legal fees
- surveys
- mortgage fees
- moving costs
- setup buffer
How labels are used across the site
Official charge: based on published tax bands or fee scales.
Lender charge: fees tied to mortgage products, valuations or broker work.
Solicitor/conveyancing estimate: legal work and disbursement planning ranges.
Market estimate: surveys, moving, furnishing or other provider-led costs.
Optional cost: useful for planning, but not required on every purchase.
Situation-dependent cost: applies only to some properties or buyer types.
Plan the full picture
Use this guide with the right follow-up pages
Start with the homepage calculator to test your own numbers, then compare this topic with Hidden costs of buying a house in the UK, Stamp duty explained: UK property tax in plain English, Mortgage fees and costs in the UK and Moving costs in the UK.
Try your own £400,000 scenario
Use the calculator to test a £400,000 purchase with your own deposit, buyer type and location instead of relying on one fixed estimate.
After completion, some buyers also look at whether overpaying their mortgage could reduce interest over time, but that should only come after the purchase costs and emergency buffer are covered.
Go to the calculatorCompare nearby property prices
If you are budgeting around this price point, it can help to compare nearby price points because deposit size, tax treatment and total upfront cash can change quickly.
Content notes
Reviewed and maintained by the TrueHomeCosts research team.
Our guides are built from official UK tax sources, public cost information and typical market price ranges. We separate fixed official charges from variable market estimates so buyers can see which figures are certain and which may change.
Last reviewed: April 2026
This content is for general guidance only and is not financial advice. For more detail, read how our estimates work or learn more about TrueHomeCosts.
FAQ
Questions buyers usually ask
How much deposit do I need for a £400,000 house?
A 10% deposit is £40,000. A 5% deposit would be £20,000, a 15% deposit would be £60,000, and a 20% deposit would be £80,000, so the right target depends on mortgage options and how much cash you still need for fees.
What are the extra costs beyond the deposit?
The extra costs usually include legal fees, surveys, mortgage costs, property tax where it applies, and moving and setup spending. Buyers should treat those separately from the deposit rather than assuming they will stay small.
Do first-time buyers pay stamp duty on a £400,000 house?
That depends on the nation, the current rules and the buyer's exact situation. First-time buyers may face a lighter tax position than home movers or additional-property buyers, but SDLT, LBTT and LTT do not all work the same way.
How much savings should I have in total?
A practical planning target is about £45,000–£65,000+ in total upfront cash on a £400,000 purchase, depending on buyer type, location and assumptions. That range is a planning estimate, not a guaranteed quote.
Related guides
Read next
Hidden costs of buying a house in the UK
A detailed guide to the hidden costs of buying a house in the UK, including solicitor fees, conveyancing disbursements, searches, surveys, transfer fees, indemnity policies and the practical extras buyers often miss.
Stamp duty explained: UK property tax in plain English
Stamp duty explained UK in plain English, including SDLT, LBTT, LTT, first-time buyer treatment, second-home costs and the main 2026 differences by nation.
Mortgage fees and costs in the UK
A practical guide to mortgage fees and costs in the UK, including broker fees, advice charges, booking fees, arrangement fees, valuation costs, ERCs and exit fees.
Moving costs in the UK
Budget for moving costs in the UK, including removal company prices, packing services, storage, mail redirection, locksmith work, cleaning, broadband and utility connection fees.
How much money do I need to buy a house in the UK?
Work out how much money you need to buy a house in the UK, including the deposit, upfront fees, property tax, legal costs, surveys, mortgage charges, moving costs and a practical buffer.
Sources and checks
These are the main public sources used for official-rate items and checks on this page. Estimate-led costs remain planning ranges rather than government charges.