Decorator extra work calculator

Estimate the selling price for extra preparation, another coat or additional woodwork using your own costs.

Price extra work before agreeing it

Extra price excluding VAT = extra labour and materials cost divided by (1 − target margin / 100). Record the scope, price and customer agreement before treating a proposed change as revenue.

What happens if you absorb the cost?

Uncharged extra costs reduce profit pound for pound. If a job was £1,200 with £800 of costs, another £100 of uncharged work lowers the £400 profit to £300. These are illustrative figures, not recommended trade prices.