Payment application calculator

How to Use This Calculator

Enter the cumulative value of work, variations and eligible materials at the valuation date. Add the retention percentage and any separate deductions, then enter the previous net certificate on the same basis. Choose the VAT treatment that applies to this application. Keep work already included in a variation out of the base-work figure.

Worked Example

For example, £10,000 of work, £1,000 of variations and £500 of materials give a gross value of £11,500. With 5% retention, £100 of deductions and a £4,000 previous net certificate, the current amount is £6,825 before any VAT added.

Before You Use the Result

A calculation supports the figures; it does not confirm entitlement to materials, disputed variations or deductions. Keep the measured progress, instructions and delivery records with the application.

For a project that needs a wider review, explore QSEC valuation and payment support alongside The Subbie QS support.

Return to the full QS tools library for related calculators. You can also read about our payment application support or use the free QS templates to organise the underlying records.

Use The Working Sheet For This Task

Organise current value, previous work, this period, retention and the supporting records.

Download the Payment Application Sheet (Excel)

Each Excel link takes you to the matching sheet preview. Enter your work email to download, replace the example entries and start using the file on your job. Marketing is optional.