Cash flow, not profit, is what closes a trade business. You can be busy, profitable on paper, and still go under because the money you are owed has not arrived while the bills you owe are due now. Trades feel this harder than most: work comes in waves, you front materials before you are paid, a slice of every payment is held back by law, and the tax you collect is not yours to spend. The fix is not more sales. It is a buffer of cash, an honest forecast, and getting paid faster than you pay out.
Why trades cash flow is lumpy
Three forces pull your bank balance around:
- The feast-and-famine cycle. Weather, seasons, and project timing mean income arrives unevenly. A strong spring can mask a thin February that is still coming.
- You finance the job. You buy materials and pay your crew before the client pays you. On a multi-week job you can be thousands out of pocket for weeks.
- The holdback. On construction work, the law lets the payer hold back a slice of every payment (commonly 10%, less in some provinces) until the lien period passes. That money is yours, but it is parked, sometimes for months. See The Statutory Holdback Explained.
Holdback timing: plan for the gap, not the surprise
The holdback is not lost, but you cannot spend it until it is released, and release is tied to the lien deadline in your province. The practical effect: on a job with a 10% holdback, treat 10% of the contract as money you will not see for some time, and price and plan as if the other 90% is your working figure. Diary the release date and chase it, because holdback does not always flow back automatically. Do not commit the holdback to next month's costs before it is actually in your account.
The tax you collect is not yours
This is where trades most often get caught short. The GST/HST you charge a client is money you are holding for the CRA, not income. So is the income tax and CPP you owe on your own profit. Spending it because it is sitting in your account leaves you scrambling at remittance time.
The defence is simple: when a payment comes in, move the tax portion out. On a $30,000 job in Ontario at 13% HST, you collected $3,900 of HST. Park it the day it lands, net of the input tax credits you can claim back, and you will never face a remittance you cannot pay. See GST/HST: The Complete Guide for how the netting works.
Build a simple cash buffer
A cash buffer is the difference between a slow month and a crisis. Aim for about three months of fixed costs (rent or mortgage on a yard, insurance, loan or lease payments, your own basic draw) sitting in reserve. Build it gradually: route a fixed percentage of every payment into a separate savings account until the buffer is full, then top it up after any month you dip into it. This is the same reserve that protects you if you are hurt and cannot work (see Business Continuity and Cover).
A simple cash-flow forecast
You do not need software. A one-page rolling forecast covers it: list the cash you expect in over the next 8 to 12 weeks (by likely payment date, not invoice date) and the cash you must pay out (materials, crew, rent, loan payments, tax remittances). The running balance shows you the tight weeks before they arrive, so you can pull an invoice forward, delay a discretionary purchase, or arrange short-term credit in advance instead of in panic.
Worked example
You finish a $40,000 reno, last on site at month-end. At a 10% holdback you can collect $36,000 now and $4,000 later. Of the $36,000, set aside the HST you collected and the income tax on your profit. Suppose materials and crew on the job cost $22,000, already paid out of pocket. The cash that is truly yours to keep this month is what is left after materials, crew, tax set-aside, and the parked holdback, which is a good deal less than the $40,000 contract value. Plan from that real number, not the headline.
Get paid faster, pay out slower
The cheapest cash flow is money you are already owed. Invoice the day the work finishes, take deposits on larger jobs, and offer easy payment such as Interac e-Transfer (see Invoicing and Getting Paid Faster). Where prompt-payment law applies, it forces the money down the chain on a fixed clock (see Prompt Payment Explained). On the paying side, use the full supplier terms you are given rather than paying early for no reason.
Common mistakes
- Spending the GST/HST you collected. It belongs to the CRA. Park it as it arrives.
- Counting the holdback as available cash. It is parked until the lien period closes. Plan around the gap.
- No buffer. Without a reserve, one slow month or one late client becomes an emergency.
- Confusing profit with cash. A profitable job can still leave you short if the cash lands after the bills are due. Forecast the timing, not just the totals.
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