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The Windfall Bond is a unique savings account, quite unlike any other. It allows you to keep your capital secure and accessible, earns interest at the Bank of England bank rate and enters you into a monthly prize draw for the chance to win up to £50,000.      

Each month, every qualifying bond is entered into a free draw for the following set of monthly prizes: 

• Ten prizes of £1,000

• Two prizes of £10,000

• One prize of £50,000

So what are your chances of winning?

The breakdown of prizes ensures that each bond has 13 opportunities to win a prize each month - 156 over the course of a year. The more bonds you hold, the greater the chance of winning a prize.

Even with one bond, your odds of landing a windfall are 64/1 in the course of the first 12 draws.

Find out more about how the Windfall Bond works

The Windfall Bond key features are:

  • Save exactly £10,000 per bond held
  • Variable interest rate linked to Bank of England Bank Rate (with linkage reviewed annually)
  • Apply for an account by post or online
  • No additions or partial withdrawals available
  • Closure available with no penalty after 35 calendar days' notice. Once given, notice of closure cannot be cancelled or amended
  • Interest paid annually on 1 August
  • Participate in the Monthly Free Draw after a qualifying period
  • Each issue has limited availability.

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 General Conditions for our Savings Accounts booklet.

Summary box

Account name


What is the interest rate?

Rate effective from 1 December 2017
Gross Gross AER1
£10,000 0.50% 0.50%
Rate effective from 1 September 2018
Gross Gross AER1
£10,000 0.75% 0.75%
  •  Interest is calculated daily and paid annually on 1 August
  • The interest rate currently tracks and pays the Bank of England Bank Rate. To access and monitor the Bank of England Bank Rate visit 

Can the Family Building Society change the interest rate? 

  • Yes, interest rate changes take effect from the 1st of the month following an announcement of a Bank of England Bank Rate change. We’ll give you notice of an interest rate change by letter or email as well as publishing this on our website
  • We'll review our linkage to the Bank of England Bank Rate on 1 November annually and give you 3 months' notice of any such change

What would the estimated balance be after 12 months based on a £10,000 deposit?

Opening balance Projected balance (Gross)
£10,000 £10,000*
*annual interest totalling £50.00 is paid away to a pre-nominated account in your name

  • This projection is based on the interest rate on 1 December 2017 and does not take into account any fluctuations in the reference interest rate over a 12 month period. 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 Windfall Bond can be applied for by post, online or at our Epsom branch
  • Each bond requires a deposit of £10,000 exactly
  • Additions are not permitted
  • Instructions for the account can be made via the Online Service, telephone or post
Can I withdraw money?

  • Withdrawals are not permitted
  • Account closure is available without access charge after 35 days' notice. Once a bond is closed it no longer qualifies for the Monthly Draw

Additional information

TAX STATUS: Interest is paid gross from 6 April 2016 due to the introduction of the Personal Savings Allowance (PSA). You will need to declare any income from savings interest earned over your PSA through a self-assessment tax return to HM Revenue & Customs

MONTHLY PRIZE DRAW: Each qualifying bond is entered into a free draw for a set of monthly prizes: 10 x £1,000, 2 x £10,000 and 1 x £50,000

This issue may be withdrawn at any time without prior notice.

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

All financial information correct on 6 August 2018

You can apply online or download an application pack.

Operating an account on behalf of someone else
This account is available for operation by Third Parties, Attorneys and Deputies. For information on how to set up any of these on your accounts please refer to our FAQs page where all the information you should need can be found.

If you have already set up Power of Attorney, a Deputy or Third Party and wish to open this account, please also refer to our FAQs page where you can find details of the forms we require.

If you have any further account opening queries please contact our New Business Team on 03330 140141.

Use of a debit card to deposit savings
Please note that the debit card you use to deposit money via the Online Service should be registered to the address we hold for you. 

Debit card transactions are subject to approval by your bank and may be declined if you do not have sufficient funds available in your bank account or the transaction exceeds your bank's anti-fraud limits.

 > Find out how the Windfall Bond works
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03330 140 141

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Family Building Society
Ebbisham House
30 Church Street
Surrey KT17 4NL
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