Notices

We're pleased to announce the launch of our Family Mortgage. Find out more.

Family members can help support buyers by providing security for their mortgage, without gifting money.
Borrow 100% of the property value with no deposit with the Family Mortgage.
Savings customers - we have increased the interest rates on our Fixed Rate Bond and Fixed Rate ISAs. Find out more

The interest rates on our 1 Year, 2 Year and 3 Year Fixed Rate Bond and Fixed Rate ISA products have increased from 12 February 2026.
Important changes to our mortgage products - Read more.

Mortgage products - On Tuesday 20 January 2026, we made changes to our mortgage product range. This includes enhanced Buy to Let HMO criteria, now catering to properties with up to six bedrooms (previously four bedrooms)
Managed Mortgage Rates and Discounted Variable Rates
From 7 February 2026, we'll be decreasing our Managed Mortgage Rates (MMR) by 0.15%. All on-sale discounted variable product rates and other details, including representative examples displayed on our website, have been updated to reflect these lower rates.
We will shortly be writing to existing customers who have been impacted by this change, with details relevant to them.

Family Security Account (1)

In a Family Security Account account, savings can act as security for the borrower's mortgage and earn interest

Annual interest (AER gross)	Account rate type	Minimum opening amount	Additional information	Monthly interest option?	Withdrawal limits	Available to new customers?
3.05%	Mortgage linked	£1	The Family Security Account can only be opened by a family member of a Family Mortgage applicant requiring the security provided by this account The account can only be applied for and operated by post.	No	Withdrawals or account closure are only available following a review of the linked Family Mortgage	No

Key features

View summary box

Linked to the Family Mortgage while your savings continue to earn interest
Account can only be applied for and operated by post
Save from £1 up to 20% of the value of the property linked to the Family Mortgage
Withdrawals or account closure are only available following a review of the linked Family Mortgage
Additions are not permitted.

The information provided below is a summary of the key features of the account and is not intended to be a substitute for reading the Product Features leaflet and the General Conditions for our Savings Account booklet.

Account info downloads

Account summary box

Account name

Family Security Account (1)

What is the interest rate?

Rate effective from 29 January 2026	Gross/AER¹
£1+	3.05%
Interest is calculated daily and paid annually on 31 December

Can the Family Building Society change the interest rate?

Yes, the interest rate is variable and may be changed. Please refer to Section 14 of the General Conditions for our Savings Accounts booklet for more information on when we may make changes to the interest rate and how this will be communicated.

What would the estimated balance be?

Opening balance	Projected balance (Gross)
£1,000	£1,030.50
This projection assumes that the account is opened with the stated amount with no additions or withdrawals made. Projected balance is at the end of 12 months All projections are provided for illustrative purposes only and do not take into account individual circumstances Actual interest may depend on the date the account is opened and the date that interest is paid.

How do I open and manage my account?

The Family Security Account can only be opened by a family member of a Family Mortgage applicant requiring the security provided by this account
The account can only be applied for by post
A minimum of £1 must be deposited
Additions are not permitted
The maximum that can be held in the account is 20% of the value of the property linked to the Family Mortgage
Instructions for the account can only be made by post.

Can I withdraw money?

Withdrawals or account closure are only available following a review of the linked Family Mortgage. Please refer to the 'Family Security Account terms' section of the Product Features leaflet for more information.

Additional information

TAX STATUS: Interest is paid gross without deduction of income tax. You will need to declare any income from savings interest earned over your PSA² through a self-assessment tax return to HM Revenue & Customs. Interest is paid annually on 31 December and available from the following day.

¹AER stands for Annual Equivalent Rate and illustrates what the annual rate would be if interest was compounded.

²PSA stands for Personal Savings Allowance.

All financial information correct on 11 February 2026.