Cash flow problems are the number one reason small trade businesses struggle — not lack of work. A full schedule doesn't help if customers pay 90 days late, jobs come in under-quoted, or you're doing extra work for free because the scope wasn't defined. Here's how to build a tighter quoting and invoicing process that protects your business.
Underquoting to win work is a trap that kills businesses slowly. You win the job, then spend the entire project stressed about margin, rushing to cut costs, or fighting with the customer over variations. Price accurately, present your value confidently, and let customers who can't afford quality work go elsewhere. A business built on well-priced jobs is sustainable. One built on buying work at any margin is not.
Fixed-price gives customers certainty and reduces disputes — most homeowners prefer it. It's also better for your business if you're efficient, since every hour saved goes to your margin. Time-and-materials suits jobs where scope genuinely can't be determined upfront — investigative work, maintenance, or anything involving opening walls. If quoting T&M, provide an honest estimated hours range and commit to communicating if it looks like going over.
Most disputes start with mismatched expectations. The customer thought something was included; you didn't. Be explicit: "This quote includes X, Y, and Z. It does not include patching and painting, council permits, or disposal of materials beyond standard waste." A few extra lines in your quote can save hours of dispute later. Never assume the customer understands what's standard.
Never do significant work without a deposit. Standard is 10–20% for residential jobs; higher for custom-order materials. Stage payments through the project so you're never far ahead of what's been paid. A typical structure for a medium-sized job: 20% deposit on signing, 40% at project midpoint, 40% on practical completion. Never deliver a completed job substantially unpaid — your leverage disappears once the work is done.
A professional invoice includes: your business name, ABN, and contact details; the customer's name and address; a unique invoice number; date issued and due date; a description of work completed; and the amount owing with GST broken out if you're registered. Use invoicing software — Xero, MYOB, or free tools like Invoice Ninja — rather than Word documents. Software auto-numbers invoices, sends payment reminders, and makes tax time far easier.
Set clear expectations upfront and enforce them consistently. If an invoice is due in 7 days and day 8 arrives with no payment, follow up that day — not a week later. A simple escalation: day 1 overdue — friendly reminder; day 7 — phone call; day 14 — formal written notice; day 21 — follow through with tribunal or debt collection. The key is consistency. If customers learn you don't enforce your terms, they'll push the limits.
For unpaid debts, small claims tribunals (VCAT in VIC, NCAT in NSW, QCAT in QLD) handle disputes up to $100,000 without a lawyer. Security of Payment laws in each state also give contractors a fast-track mechanism to recover unpaid invoices on construction work. Your best protection in any dispute is documented evidence: photos, written sign-offs, and text messages approving variations.
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