Use the rate you have already confirmed.
The calculator runs in your browser and stores no quotation figures. It deliberately does not decide which VAT rate applies to a particular type of building work.
Add VAT to a net figure or extract VAT from a gross figure.
Two quotations can look different simply because VAT is presented differently.
Confirm the basis
Check whether each contractor price is net, gross or partly based on allowances with different tax treatment.
Do not infer the rate
Building work can involve project-specific VAT treatment. This tool does not provide tax advice or classify the works.
Compare consistently
Once the correct treatment is known, put all quotations onto the same net or gross basis before comparing headline totals.
Build the full project budget.
Organise construction cost, fees, allowances, client-supplied products and contingency in one planning view.
Open budget plannerNormalise quotation differences.
Use the quote comparison tool to review VAT treatment alongside exclusions, provisional sums and programme duration.
Compare builder quotesUse this tool differently depending on your role.
Use it to make the next decision clearer.
Use it to put quotations and budget figures onto the same net or gross basis once the correct VAT treatment has been confirmed, reducing accidental apples-to-oranges comparisons.
Use it to reduce commercial ambiguity.
Use it to present the commercial basis of your quotation clearly and avoid ambiguity about whether headline figures are net or VAT-inclusive.
Use it to support structured advice and procurement.
Use it as an arithmetic check when normalising tender or budget figures, while keeping responsibility for the correct tax treatment with the appropriate parties and advice.
You stay in control of what becomes public and when you connect.
BuildConnect separates useful marketplace information from private account details. The controls differ by role, so clients, contractors and professionals can participate without having to make everything public.
Clients
Client contact details remain private until the client chooses to connect with a contractor. Start with the project information rather than publishing personal contact details.
Post a projectContractors
A public contractor profile is optional. If enabled after verification, selected company information can be published while private account details and insurance expiry dates remain private.
Create contractor accountProfessionals
Professional public profiles are optional and require approval. Work email addresses are not displayed publicly, and marketing updates have a separate optional opt-in.
Join professional network