Cash flow for trade businesses: why profitable companies still run out of money

By the SKEDS Team · 6 November 2026 · 6 min read

There's a sentence every accountant has said to a shocked trade business owner: "You made a profit last year." Shocked, because the bank account spent the whole year gasping — wages scraped together, supplier accounts juggled, the owner's own drawings skipped. Profitable on paper, broke in practice. This isn't rare or shameful; it's the default physics of trade work, where money goes out steadily (wages weekly, materials on 20th-of-month accounts, fuel daily) and comes in lumpily (invoices sent late, paid later).

The distance between those two rhythms is called the cash gap, and managing it — not just earning profit — is the actual financial job of running a trade business.

Meet your cash gap

Trace one renovation: materials bought day 1, wages paid days 1–20, subbie invoice day 25... and your customer's payment arrives around day 50, after the job was invoiced (eventually) on terms (stretched). For those seven weeks, your cash funded their project. Now overlap three jobs and add GST collected-but-not-yet-paid sloshing through the account pretending to be yours, and you have the standard trade cash profile: a business that can be growing, profitable and unable to make Friday's payroll in the same month. Growth actually makes it worse — every new job extends more of your cash before any of it returns.

Lever 1: shrink the gap at the invoice end

The fastest lever is the one entirely in your control: the lag between finishing work and asking to be paid. Every day a completed job sits uninvoiced is an interest-free loan you're extending. The fix is mechanical — invoice from the driveway the moment the job is done, with time and materials already on the job so the invoice builds itself — and the discipline shows up in one number: unbilled completed work, which a healthy business keeps near zero.

Lever 2: pull cash forward on big jobs

Anything spanning weeks shouldn't be financed by you. Deposits and progress payments restructure the timeline: a deposit covers materials before they're bought, stage claims land as milestones pass, and your exposure never exceeds a couple of weeks' work. This single change flattens the scariest spikes in most trade cash curves.

Lever 3: compress the collection tail

Invoiced isn't banked. The tail — the days between invoice and payment — is where cash quietly dies: 7-day terms drifting to 35, the polite reluctance to chase, the same three customers always last. Compress it with an instant payment option on every invoice, a systematic follow-up ladder for overdues that runs on schedule rather than on courage, and debtor-days tracking so slow payers get identified and moved to deposits. Because SKEDS syncs invoices and payments with Xero, [MYOB](https://www.myob.com/) or QuickBooks, "who owes what, how overdue" is always one screen, not a reconciliation project.

Lever 4: stop the silent leaks

Cash flow isn't only timing — it's completeness. The unbilled hour, the fitting that went into the wall but not onto the invoice, the "while you're here" extra done as an undocumented favour: each is cash you earned and never asked for. Time tracked to jobs, materials logged as used, variations approved in writing — the same habits that protect margin protect the cash that margin was supposed to become.

Lever 5: see next month before it arrives

The last lever is a forecast humble enough to actually get done: one page, six weeks forward. Known money in (invoices outstanding by expected date, stage claims coming due, forward bookings at realistic values) against known money out (wages, rent, supplier accounts, GST and tax dates, loan payments). Fifteen minutes a week keeps it alive. The point isn't precision — it's warning: a crunch seen five weeks out is solved with invoicing pushes and gentle scheduling changes; the same crunch discovered on Thursday is solved with expensive debt and panic.

A note on the two great imposters in your bank balance: GST collected and tax accruing were never your money. Sweep them to a separate account as invoices are paid, and the balance you see becomes the balance you have.

Frequently asked questions

How much cash buffer should a trade business hold? Enough to cover the gap you actually run — for most small trades, one to two months of fixed costs plus payroll. Build it in the good months; seasonal businesses need the top of that range.

Is an overdraft a cash flow strategy? It's a shock absorber, not a strategy. If the overdraft is permanently in use, the gap is structural — fix the levers, then the facility becomes what it should be: insurance.

Which number should I watch first? Unbilled completed work, weekly. It's the leak most in your control and the fastest to fix — most businesses fund their own crisis one late invoice at a time.