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Spreadsheet calculator

Index-linked Savings Certificates estimates for December 2009

Right-click on the link below to download a spreadsheet calculator. The spreadsheet estimates the current value of certificates bought up to ten years ago and held for one year or more. All returns are tax-free. 

• Spreadsheet calculator

Using the spreadsheet

You will need Microsoft Excel to use the above spreadsheet file. A compatible program, such as the free Open Office (version 2.0 or higher), or Microsoft's free Excel viewer, may allow you to view the spreadsheet.

Certificates cashed in within the first year of investing don’t earn any index-linking or extra interest.

Valuations by phone

If you would like more information or a valuation of your Certificates - call us free on 0500 007 007*. For valuations please quote Issue number, purchase price and purchase date.

*Your call will be taken by one of NS&I’s award-winning UK customer service team. We’re available every day from 7am till midnight. Calls from mobiles may not be free. Calls may be recorded.