Estimate the cost to start a construction business
Use this worksheet as a scoping tool, not as a quoted industry average. Local rents, scale, equipment condition, financing terms and compliance choices can change the result materially. Replace every placeholder with a dated quote, written assumption or verified fee.
| Cost category | How to estimate | Classification |
|---|---|---|
| Equipment | Enter supplier quote | One-time |
| Mobilization | Enter supplier quote | One-time |
| Bonding | Enter supplier quote | One-time |
| Payroll Bridging And Project Working Capital | Enter supplier quote | One-time |
| Contingency | 5%–15% of quoted startup costs | Do not hide this inside working capital |
Calculate the funding requirement
Total project cost = one-time setup + opening assets + pre-opening expenses + operating cash buffer + contingency. Then subtract confirmed owner cash, assets contributed at supportable value and approved financing. Do not subtract hoped-for sales.
Size working capital separately
Build a monthly cash forecast using awarded backlog, project values, completion timing and change orders and field labour, subcontractors, materials, equipment, bonding and holdbacks. Include deposits, tax timing, debt payments, owner draws and the lag between a sale and collected cash. The required buffer is driven by the lowest cumulative cash position plus a risk reserve.
Avoid double counting
- Separate equipment purchase from its financing payment.
- Record recoverable taxes consistently.
- Do not include the same opening inventory in setup and monthly cost of sales.
- Distinguish contingency from ordinary working capital.
- Reconcile this schedule to the balance sheet and cash-flow forecast.