Mortgage ISAs

See a list of the best mortgage savings account

Updated: 01.09.2026

Quick Rates Review

Compare top financial options at a glance. Comprehensive analysis for each listed offer is available further down the page

#
Institution
Rate (APR/APY)
Sum & Term
1
Halifax Halifax
1.3% - 2.75%

Up to $1

Flexible Term

2
HSBC Bank HSBC Bank
2% - 3.5%

Flexible Amount

Flexible Term

3
Melton Building Society Melton Building Society
2.65%

Flexible Amount

Flexible Term

4
OakNorth Bank OakNorth Bank
3.60% - 4.75%

Flexible Amount

35 - 120 days

5
Scotish Building Society Scotish Building Society
3.75%

$1 - $1,000,000

Flexible Term

6
Saffron Building Society Saffron Building Society
3.85%

Up to $5,000

Flexible Term

7
Skipton Building Society Skipton Building Society
3.85%

Up to $1

Flexible Term

8
Aldermore Bank Aldermore Bank
4.35%

Up to $1,000

30 days

Quick Expert Insights

Interest Rates
Average:3.17%
Range:1.3% - 4.75%
Product Term
Minimum: 30 days
Maximum: 120 days
Limit / Amount
Min Entry:$1
Max Limit:$1,000,000
Analysis of 8 offers shows an average rate of 3.17%, with the absolute market maximum reaching 4.75%. Flexible terms from 30 days are available at Aldermore Bank, while OakNorth Bank offers terms up to 120 days . The lowest entry is $1 (via Halifax).

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Filter By Institution:

Aldermore Bank

30 day notice savings account

Rate: 4.35%

Sum: $1,000

Term: 30 days

📋 Important Terms

FSCS Protected

The interest rates on our Notice Accounts are variable

You can make unlimited withdrawals

Halifax

Help to Buy ISA

Rate: 1.3% - 2.75%

Sum: $1

📋 Important Terms

Receive a 25% bonus from the Government towards your first home, up to £3,000

Save up to £200 per month by standing order, to be received by the 25th of the month

HSBC Bank

Help to Buy: ISA

Rate: 2% - 3.5%

📋 Important Terms

Save your money

Claim your bonus

Melton Building Society

30 Day Notice

Rate: 2.65%

OakNorth Bank

Notice savings account

Rate: 3.60% - 4.75%

Term: 35 days - 120 days

Saffron Building Society

30 Day Notice account

Rate: 3.85%

Sum: $5,000

Scotish Building Society

30 Day Notice account

Rate: 3.75%

Sum: $1 - $1,000,000

Skipton Building Society

Notice savings account

Rate: 3.85%

Sum: $1

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What is an ISA mortgage in the United Kingdom?

The essence of this type of account follows from its name. Therefore, we can give the following definition:

An ISA mortgage is a type of mortgage where the borrower uses an Individual Savings Account (ISA) to save money and pay off the mortgage at the end of the term.

Let's consider the main features of mortgage savings accounts:

  • Interest-only mortgage. When you take out a mortgage ISA, you only pay the interest on the mortgage loan each month. That is, the credit burden on your budget is much smaller than with a conventional mortgage
  • Savings ISA: You regularly save money in a tax-free ISA.
  • Repayment at the end of the term: With a savings account, you can accumulate enough savings to pay off the mortgage at the end of the mortgage term.

Calculate future income on a 1-year term deposit (example): 

Amount, $ Rate, % Accrued %, $
25,000 4.30% 1,075
25,000 4.35% 1,088
25,000 4.40% 1,100
50,000 4.80% 2,400
50,000 4.85% 2,425
50,000 4.90% 2,450
100,000 5.30% 5,300
100,000 5.35% 5,350
100,000 5.40% 5,400
200,000 4.80% 9,600
200,000 4.85% 9,700
200,000 4.95% 9,900

What are the main types of ISA used for such a mortgage:

  • Cash ISA: Interest on this savings account is tax-free.
  • Stocks and Shares ISAs: By choosing this type of investment in company shares, you can get a higher level of income, but the risk is slightly higher

Therefore, when choosing a mortgage savings account, it is worth carefully calculating whether your savings will grow enough to cover the mortgage.

You can see the similar FAQ at the link:

Contacts of companies offering the financial services:

Aldermore Bank

Address: Apex Plaza, Forbury Road, Reading, RG1 1AX

Web: www.aldermore.co.uk

SWIFT: ALDBGB2P

Stock: 51WB

Halifax

Address: The Mound, Edinburgh EH1 1YZ

Contact: 0345-720-3040

Web: www.halifax.co.uk

Stock: HALP

HSBC Bank

Address: Unit 8, Canada Square, Retail, London E14 5AH

Web: www.hsbc.co.uk

SWIFT: HBUKGB4B

Stock: HSBA

Melton Building Society

Address: Mutual House, Leicester Rd, Melton Mowbray

Web: www.themelton.co.uk

OakNorth Bank

Address: 57 Broadwick Street London, WIF 9QS, UK

Contact: 0161-713-4071

Web: oaknorth.co.uk

SWIFT: OAKNGB22

Saffron Building Society

Address: 1A Market St, Saffron Walden CB10 1HX

Web: www.saffronbs.co.uk

Scotish Building Society

Address: 93 Dalry Rd, Edinburgh, Edinburgh, EH11 2EF, United Kingdom

Contact: 0333-207-4007

Web: www.scottishbs.co.uk

Skipton Building Society

Address: 71 High Holborn, London WC1V 6EA

Web: www.skipton.co.uk

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