How much deposit do I need in the UK?

Minimum 5% for most residential mortgages, but 10–25% gets meaningfully better rates. Help-to-buy and guarantor mortgages can reduce the cash needed.

What is Stamp Duty Land Tax?

A one-off purchase tax in England & NI charged in marginal bands on the purchase price, with higher surcharges for second homes and relief for first-time buyers.

Repayment or interest-only?

Repayment mortgages guarantee the loan is cleared by term end. Interest-only is cheaper monthly but you must have a credible repayment vehicle for the full principal.

Mortgage Calculator UK

Designed for UK home buyers: monthly repayment and interest-only payments in British pounds, optional taxes, insurance and other costs, plus an estimated Stamp Duty Land Tax bill including first-time buyer relief and a full amortization schedule.

#uk mortgage#british mortgage#stamp duty#interest only mortgage#repayment mortgage

Live calculate

Presets

Home Price

Mortgage Deposit

Loan Term

years

Interest Rate

First-Time Buyer?

NoYes

Taxes

% / year

Home Insurance

£/year

Mortgage Insurance

£/year

Other Costs

£/year

First Payment Date

Live mode: results update as you type.

Monthly Repayment

£2,192.21

Interest-only would be £1,562.50/mo · £3,400.55 total out-of-pocket

House Price: £500,000
Mortgage Deposit: £125,000 (25.0%)
Loan Amount: £375,000
Monthly Repayment: £2,192.21
Interest-Only Payment: £1,562.50
Total Interest (repayment): £282,664
Stamp Duty Estimate: £12,500
Effective Stamp Duty Rate: 2.50%
Payoff Date: November 8, 2051

Monthly out-of-pocket breakdown

Mortgage Repayment$2,192
Taxes$500
Insurance$208
Other Costs$500

Amortization schedule (annual)

Year	Beginning Balance	Total Paid	Principal	Interest	Ending Balance
Year 1	$375,000.00	$26,306.55	$7,732.15	$18,574.40	$367,267.85
Year 2	$367,267.85	$26,306.55	$8,127.74	$18,178.81	$359,140.11
Year 3	$359,140.11	$26,306.55	$8,543.57	$17,762.98	$350,596.53
Year 4	$350,596.53	$26,306.55	$8,980.68	$17,325.87	$341,615.86
Year 5	$341,615.86	$26,306.55	$9,440.15	$16,866.40	$332,175.71
Year 6	$332,175.71	$26,306.55	$9,923.12	$16,383.43	$322,252.59
Year 7	$322,252.59	$26,306.55	$10,430.81	$15,875.74	$311,821.78
Year 8	$311,821.78	$26,306.55	$10,964.47	$15,342.08	$300,857.31
Year 9	$300,857.31	$26,306.55	$11,525.43	$14,781.12	$289,331.88
Year 10	$289,331.88	$26,306.55	$12,115.09	$14,191.46	$277,216.78
Year 11	$277,216.78	$26,306.55	$12,734.93	$13,571.63	$264,481.86
Year 12	$264,481.86	$26,306.55	$13,386.47	$12,920.08	$251,095.39
Year 13	$251,095.39	$26,306.55	$14,071.35	$12,235.21	$237,024.04
Year 14	$237,024.04	$26,306.55	$14,791.26	$11,515.29	$222,232.78
Year 15	$222,232.78	$26,306.55	$15,548.01	$10,758.54	$206,684.77
Year 16	$206,684.77	$26,306.55	$16,343.48	$9,963.07	$190,341.29
Year 17	$190,341.29	$26,306.55	$17,179.64	$9,126.91	$173,161.65
Year 18	$173,161.65	$26,306.55	$18,058.58	$8,247.97	$155,103.07
Year 19	$155,103.07	$26,306.55	$18,982.50	$7,324.06	$136,120.57
Year 20	$136,120.57	$26,306.55	$19,953.68	$6,352.88	$116,166.90
Year 21	$116,166.90	$26,306.55	$20,974.54	$5,332.01	$95,192.35
Year 22	$95,192.35	$26,306.55	$22,047.64	$4,258.91	$73,144.71
Year 23	$73,144.71	$26,306.55	$23,175.64	$3,130.91	$49,969.07
Year 24	$49,969.07	$26,306.55	$24,361.35	$1,945.20	$25,607.72
Year 25	$25,607.72	$26,306.55	$25,607.72	$698.83	$0.00

Stamp Duty is charged marginally: 0% to £250k, 5% to £925k, 10% to £1.5m and 12% above. First-time buyers pay nothing up to £425k and 5% only on £425k–£625k. Interest-only loans repay no principal monthly — the full loan is due at term end.

Most useful next

Formula

Repayment: P·r(1+r)^n/((1+r)^n−1); Interest-only: P × r/12; Stamp Duty = Σ marginal band × band rate

Pro tips

• A 25% deposit unlocks the best UK rates; under 10% many lenders add arrangement fees or rate premiums.
• UK fixed deals typically run 2–5 years — remortgage at the end or slip onto the costly standard variable rate.
• Overpayments of up to 10%/year are allowed by most UK fixed deals without penalty.

FAQ

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Mortgage Calculator UK

#uk mortgage#british mortgage#stamp duty#interest only mortgage#repayment mortgage

Year

Beginning Balance

Total Paid

Principal

Interest

Ending Balance

Year 1

$375,000.00

$26,306.55

$7,732.15

$18,574.40

$367,267.85

Year 2

$367,267.85

$26,306.55

$8,127.74

$18,178.81

$359,140.11

Year 3

$359,140.11

$26,306.55

$8,543.57

$17,762.98

$350,596.53

Year 4

$350,596.53

$26,306.55

$8,980.68

$17,325.87

$341,615.86

Year 5

$341,615.86

$26,306.55

$9,440.15

$16,866.40

$332,175.71

Year 6

$332,175.71

$26,306.55

$9,923.12

$16,383.43

$322,252.59

Year 7

$322,252.59

$26,306.55

$10,430.81

$15,875.74

$311,821.78

Year 8

$311,821.78

$26,306.55

$10,964.47

$15,342.08

$300,857.31

Year 9

$300,857.31

$26,306.55

$11,525.43

$14,781.12

$289,331.88

Year 10

$289,331.88

$26,306.55

$12,115.09

$14,191.46

$277,216.78

Year 11

$277,216.78

$26,306.55

$12,734.93

$13,571.63

$264,481.86

Year 12

$264,481.86

$26,306.55

$13,386.47

$12,920.08

$251,095.39

Year 13

$251,095.39

$26,306.55

$14,071.35

$12,235.21

$237,024.04

Year 14

$237,024.04

$26,306.55

$14,791.26

$11,515.29

$222,232.78

Year 15

$222,232.78

$26,306.55

$15,548.01

$10,758.54

$206,684.77

Year 16

$206,684.77

$26,306.55

$16,343.48

$9,963.07

$190,341.29

Year 17

$190,341.29

$26,306.55

$17,179.64

$9,126.91

$173,161.65

Year 18

$173,161.65

$26,306.55

$18,058.58

$8,247.97

$155,103.07

Year 19

$155,103.07

$26,306.55

$18,982.50

$7,324.06

$136,120.57

Year 20

$136,120.57

$26,306.55

$19,953.68

$6,352.88

$116,166.90

Year 21

$116,166.90

$26,306.55

$20,974.54

$5,332.01

$95,192.35

Year 22

$95,192.35

$26,306.55

$22,047.64

$4,258.91

$73,144.71

Year 23

$73,144.71

$26,306.55

$23,175.64

$3,130.91

$49,969.07

Year 24

$49,969.07

$26,306.55

$24,361.35

$1,945.20

$25,607.72

Year 25

$25,607.72

$26,306.55

$25,607.72

$698.83

$0.00

Pro tips

• A 25% deposit unlocks the best UK rates; under 10% many lenders add arrangement fees or rate premiums.

• UK fixed deals typically run 2–5 years — remortgage at the end or slip onto the costly standard variable rate.

• Overpayments of up to 10%/year are allowed by most UK fixed deals without penalty.