How much would I pay on a £100,000 mortgage?

Repayments, total interest and amortisation to borrow with confidence.

Last updated:

warning icon Warning: your home may be repossessed if you do not keep up repayments on your mortgage.
If you’re ready to buy a home, you might wonder how to budget for your target home cost. Here’s a breakdown of what you might face monthly, in interest and over the life of a £100,000 mortgage.

How can we help?

L&C Mortgage Advice

Speak to an adviser

Talk to a fee-free mortgage adviser from our partner L&C. Open 7 days a week, 'til 8pm weekdays. Call free (mobile or landline).

L&C Online Journey

Online mortgage finder

Complete our form to access personalised information on mortgages to suit your particular needs.

Mortgage Comparison Habito

Browse mortgage rates

Fast and simple comparison of today’s best rates and overview of mortgage options from a range of UK lenders.

Monthly payments on a £100,000 mortgage

At a 4% fixed interest rate, your monthly mortgage payment on a 30-year mortgage might total £477.42 a month, while a 15-year might cost £739.69 a month.

Note that your monthly mortgage payments will vary depending on your interest rate, taxes and PMI, among related fees.

Your total interest on a £100,000 mortgage

On a 30-year mortgage with a 4% fixed interest rate, you’ll pay £71,869.51 in interest over the life of your loan. That’s about two-thirds of what you borrowed in interest.

If you instead opt for a 15-year mortgage, you’ll pay £33,143.83 in interest over the life of your loan, or about half of the interest you’d pay on a 30-year mortgage.

Amortisation schedule

When you take out a mortgage, you agree to pay the principal and interest over the life of the loan. Your interest rate is applied to your balance and as you pay down your balance, the amount you pay in interest changes.

Amortisation means that at the beginning of your loan, a big percentage of your payment is applied to interest. With each subsequent payment, you pay more towards your balance.

Estimate your monthly loan repayments on a £100,000 mortgage at 4% fixed interest with our amortisation schedule over 15 and 30 years.

YearBeginning balanceTotal interest paidTotal principal paidRemaining balance
1£100,000.00£3,909.61£4,966.67£95,033.35
2£95,033.35£3,707.25£5,169.03£89,864.34
3£89,864.34£3,496.65£5,379.63£84,484.75
4£84,484.75£3,277.51£5,598.77£78,885.98
5£78,885.98£3,049.37£5,826.91£73,059.11
6£73,059.11£2,811.99£6,064.29£66,994.84
7£66,994.84£2,564.92£6,311.36£60,683.50
8£60,683.50£2,307.79£6,568.49£54,115.03
9£54,115.03£2,040.17£6,836.11£47,278.96
10£47,278.96£1,761.68£7,114.60£40,164.37
11£40,164.37£1,471.79£7,404.49£32,759.92
12£32,759.92£1,170.13£7,706.15£25,053.80
13£25,053.80£856.18£8,020.10£17,033.72
14£17,033.72£529.43£8,346.85£8,686.89
15£8,686.89£189.38£8,686.90£0.00
YearBeginning balanceTotal interest paidTotal principal paidRemaining balance
1£100,000.00£3,967.95£1,761.09£98,238.96
2£98,238.96£3,896.19£1,832.85£96,406.18
3£96,406.18£3,821.53£1,907.51£94,498.73
4£94,498.73£3,743.82£1,985.22£92,513.56
5£92,513.56£3,662.94£2,066.10£90,447.51
6£90,447.51£3,578.77£2,150.27£88,297.29
7£88,297.29£3,491.15£2,237.89£86,059.47
8£86,059.47£3,399.97£2,329.07£83,730.48
9£83,730.48£3,305.09£2,423.95£81,306.59
10£81,306.59£3,206.35£2,522.69£78,783.96
11£78,783.96£3,103.56£2,625.48£76,158.55
12£76,158.55£2,996.62£2,732.42£73,426.17
13£73,426.17£2,885.29£2,843.75£70,582.48
14£70,582.48£2,769.43£2,959.61£67,622.93
15£67,622.93£2,648.85£3,080.19£64,542.80
16£64,542.80£2,523.36£3,205.68£61,337.18
17£61,337.18£2,392.76£3,336.28£58,000.96
18£58,000.96£2,256.84£3,472.20£54,528.82
19£54,528.82£2,115.38£3,613.66£50,915.22
20£50,915.22£1,968.16£3,760.88£47,154.39
21£47,154.39£1,814.93£3,914.11£43,240.34
22£43,240.34£1,655.46£4,073.58£39,166.83
23£39,166.83£1,489.52£4,239.52£34,927.36
24£34,927.36£1,316.79£4,412.25£30,515.16
25£30,515.16£1,137.01£4,592.03£25,923.21
26£25,923.21£949.95£4,779.09£21,144.17
27£21,144.17£755.23£4,973.81£16,170.42
28£16,170.42£552.61£5,176.43£10,994.04
29£10,994.04£341.70£5,387.34£5,606.76
30£5,606.76£122.23£5,606.81£0.00

Start your mortgage application

Habito

Habito

Save £1,000s on your mortgage. Applying is quick & easy with Habito. Get a quote online in minutes.
Mojo Mortgages

Mojo Mortgages

The Mojo mortgage calculator compares rates in less than 1 minute. A free online mortgage broker.
L&C cobrand

L&C

The UK's largest fee-free mortgage broker & adviser. No hidden costs. L&C compares rates from over 80 lenders.

We exist to help you find better. The offers we've compared on this page are from a range of products whose details we can track; we don't cover every product on the market...yet. Unless we've indicated otherwise, products are shown in no particular order or ranking. The terms "best", "top", "cheap" (and variations of these) aren't product ratings, although we always explain what's great about a product when we highlight it; this is subject to our terms of use. When you make major financial decisions, it's wise to consider getting independent financial advice. Always consider your own financial circumstances when you compare products so you get what's right for you.

Was this content helpful to you? No  Yes

Ask an Expert

You are about to post a question on finder.com:

  • Do not enter personal information (eg. surname, phone number, bank details) as your question will be made public
  • finder.com is a financial comparison and information service, not a bank or product provider
  • We cannot provide you with personal advice or recommendations
  • Your answer might already be waiting – check previous questions below to see if yours has already been asked

Finder.com provides guides and information on a range of products and services. Because our content is not financial advice, we suggest talking with a professional before you make any decision.

By submitting your comment or question, you agree to our Privacy and Cookies Policy and Terms of Use.

Questions and responses on finder.com are not provided, paid for or otherwise endorsed by any bank or brand. These banks and brands are not responsible for ensuring that comments are answered or accurate.
Go to site