Cash Flow for Builders and Tradespeople: How to Stop Running Out of Money Between Jobs
Cash flow problems in trade businesses come from three sources: materials and labour paid upfront before the customer pays; customers who pay late or not at all; and gaps between jobs with no income. The solutions are stage payments built into every contract, immediate invoicing on completion, a standard payment chase process, and a cash reserve equivalent to 2 months of business costs.
- Why trade businesses run out of cash even when they are profitable
- Stage payments: the essential tool for large jobs
- Invoice immediately: the simplest cash flow improvement
- Dealing with slow-paying and non-paying customers
- Building a cash reserve to survive the gaps between jobs
Why trade businesses run out of cash even when they are profitable#
A builder who completes a £45,000 project in 6 weeks may have spent £18,000 on materials in week 1 and £12,000 on labour and subcontractors weeks 2–6 — all before the customer pays their invoice at 30-day terms from completion. Total cash out before cash in: £30,000. The profit on the job might be £9,000 — but the business needed to fund £30,000 of costs for up to 10 weeks before receiving any income. If the customer pays late (or disputes part of the invoice), this cash flow gap extends further. For a trade business running multiple jobs simultaneously, these gaps compound.
Stage payments: the essential tool for large jobs#
Stage payments are scheduled payments tied to project milestones, agreed before work starts and written into the contract. A typical structure: 25–30% deposit on signing the contract; 25–30% at a defined early milestone (foundations complete, first fix complete); 25–30% at second milestone (plastering complete, second fix complete); 10–15% on practical completion. Stage payments ensure that by the time you have incurred the cost of each phase, the customer has already paid for it. They also protect you from non-payment risk — the amount outstanding at any point is much smaller than the total job value. Never start a job of any significant size without a signed contract and deposit received.
Invoice immediately: the simplest cash flow improvement#
Most tradespeople delay invoicing after job completion — for a day, a week, sometimes longer. This delay directly delays payment. Your customer's 30-day payment clock starts when they receive your invoice, not when the job is finished. Invoice on the same day the job completes, or on the day the agreed milestone is reached. Use an invoicing app on your phone (Jobber, Tradify, or even a FreshBooks invoice template) so you can invoice from the van before you drive home. A business that consistently invoices within 24 hours of completion is paid an average of 8–12 days faster than one that batches invoicing at month end — that is £10,000–£30,000 more in the bank at any given time on a busy trade business.
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Dealing with slow-paying and non-paying customers#
The best defence against non-payment is prevention: stage payments, a clear written contract, and a professional relationship from day one. When payment is late: send a payment reminder by email the day after the due date; follow up by phone 3 days after the due date (a phone call is far more effective than email for late payment); send a formal letter before action 14 days after the due date citing your right to charge statutory interest under the Late Payment of Commercial Debts Act 1998 (8% above Bank of England base rate on B2B debts). For debts under £10,000, Money Claim Online (MCOL) at gov.uk is a fast, low-cost route to a county court judgment. The threat of court action resolves most disputes before they reach that stage.
Building a cash reserve to survive the gaps between jobs#
Seasonal patterns, job cancellations, and unexpected delays create gaps between active jobs where cash income stops but overhead continues. Trades that work outdoors (groundworks, roofing, landscaping) are particularly exposed to weather-related gaps in winter. Building a cash reserve — held in a separate business savings account — protects the business during these periods. Target: 8–10 weeks of operating costs (wages, van finance, insurance, materials for jobs already booked). Transfer 10% of every payment received to the reserve account until you reach the target. This discipline takes 12–18 months to establish on most trade businesses but fundamentally changes the financial resilience of the operation.
People also ask
How do I get customers to pay faster as a tradesperson?
Build stage payments into every contract and collect a deposit before starting. Invoice immediately on completion or milestone reached. Follow up overdue invoices by phone (not just email) on day 1 after the due date. Accept card payments on site — customers who can pay instantly often do. Offer a small early payment discount (2–3%) for payment within 7 days on large jobs.
What is a stage payment in construction?
A stage payment is a scheduled payment tied to a defined project milestone, agreed in the contract before work starts. Typical stages: deposit (25–30% on signing), progress payment at first fix or midpoint (25–30%), near-completion payment (25–30%), and retention released on practical completion (10–15%). Stage payments reduce both cash flow stress and non-payment risk.
What should I do if a customer refuses to pay?
If a customer refuses to pay: send a formal letter before action giving 14 days to pay. If unpaid, file a claim through Money Claim Online (MCOL) at gov.uk for debts under £10,000. For debts over £10,000, consider a solicitor's letter first. You are also entitled to charge statutory interest (8% above Bank of England base rate) on overdue B2B invoices under the Late Payment of Commercial Debts Act 1998.
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