How much deposit do I need for a £450K house?

You need £22,500 (5%) minimum, but £45,000-£67,500 (10-15%) is more realistic. At this price, most lenders prefer 10%+.

What salary do I need for a £450K house?

With a 10% deposit (£405K mortgage), you typically need £90,000-£101,250 income at standard 4-4.5x lending multiples.

How Much Deposit for a £450,000 House UK (2026 Guide)

For a £450,000 house, you’ll need a minimum deposit of £22,500 (5%), though £45,000-£90,000 (10-20%) is strongly recommended.

Deposit Options for £450K House

Deposit %	Amount	Mortgage	Best Rate Tier
5%	£22,500	£427,500	Higher rates (~5.5%)
10%	£45,000	£405,000	Good rates (~4.5%)
15%	£67,500	£382,500	Better rates (~4.2%)
20%	£90,000	£360,000	Best rates (~4.0%)

Monthly Payments by Deposit Size

Deposit	Mortgage	Monthly Payment (25yr)	Rate
5% (£22.5K)	£427,500	£2,631	5.5%
10% (£45K)	£405,000	£2,255	4.5%
15% (£67.5K)	£382,500	£2,070	4.2%
20% (£90K)	£360,000	£1,901	4.0%

A 20% deposit saves £730/month compared to 5%.

Total Upfront Costs

Cost	5% Deposit	10% Deposit	20% Deposit
Deposit	£22,500	£45,000	£90,000
Stamp duty (FTB)	£7,500	£7,500	£7,500
Stamp duty (mover)	£12,500	£12,500	£12,500
Solicitor	£2,200	£2,200	£2,200
Survey	£750	£750	£750
Arrangement fee	£999	£999	£999
FTB Total	£33,949	£56,449	£101,449

Income Required

Deposit %	Mortgage	Income Needed (4.5x)
5%	£427,500	£95,000
10%	£405,000	£90,000
15%	£382,500	£85,000
20%	£360,000	£80,000

Joint Buyer Options

Deposit	Mortgage	Single Income (4.5x)	Joint Option
10%	£405,000	£90,000	£50K + £40K
15%	£382,500	£85,000	£47K + £38K
20%	£360,000	£80,000	£45K + £35K

Lifetime Cost Comparison

Deposit Level	5%	10%	20%
Deposit paid	£22,500	£45,000	£90,000
Total interest (25yr)	£361,675	£271,421	£210,222
Total cost	£811,675	£721,421	£660,222
Savings vs 5%	—	£90,254	£151,453

Saving for Your Deposit

At this price point, you likely need aggressive saving:

Monthly Savings	Time to £45K	Time to £90K
£1,000	3.8 years	7.5 years
£1,500	2.5 years	5 years
£2,000	1.9 years	3.8 years
£2,500	1.5 years	3 years

Written by WealthVieu

WealthVieu researches and writes data-driven personal finance guides using primary sources including the IRS, Bureau of Labor Statistics, Federal Reserve, and Census Bureau.

The content on Wealthvieu is for informational purposes only and should not be considered financial, tax, or investment advice. Consult a qualified professional before making financial decisions. Full disclaimer · Editorial policy