Project Cost Estimator
Enter your costs below to calculate the total project price including VAT and markup.
Guided Mode (DIY-friendly)
Work through base costs, then pricing rates, then review before calculating.
Base costs
Rates
Review
Base Cost Breakdown
UKUK Building Regulations
References & Sources
Standards Cited
- RICS NRM 1 — RICS New Rules of Measurement 1 — Order of cost estimating and cost planning for capital building works
Provides the standard framework for project cost estimation, including materials, labour, overhead, and markup structures
Formulas Used
- Subtotal:
subtotal = materialsCost + labourCost + otherCosts
Source: RICS NRM 1 - Markup Amount:
markup = subtotal x (markupPercent / 100)
Source: Standard industry markup/overhead practice - VAT Amount:
vat = (subtotal + markup) x (vatRate / 100)
Source: HMRC VAT regulations — VAT is applied to the marked-up amount; default 20% UK standard rate - Total Project Cost:
total = subtotal + markup + vat
Source: RICS NRM 1 - Cost Breakdown Percentages:
componentPercent = (componentCost / totalCost) x 100
Source: Standard accounting
Key Assumptions
- VAT is applied after markup/overhead is added to the subtotal — RICS NRM 1 / HMRC VAT guidance
- Default VAT rate is 20% (UK standard rate) — HMRC
- Markup/overhead is applied as a percentage of the subtotal (materials + labour + other) — Standard industry practice per RICS NRM 1