Cash flow for contractors: smoothing the lumps

Contracting pays the same yearly total as a salary, it just arrives lumpier: good months, thin months, invoices paid late, and the odd gap between contracts. Most contractor money stress comes from that shape, not the size of the income. You can smooth it with a handful of moving parts, none of which require you to earn more.

The buffer: your own salary fund

Separate earning from spending. Income lands in the business account whenever clients pay, and you pay yourself a level monthly amount from it on your own schedule. The buffer between the two absorbs the lumps. Build toward two or three months of personal outgoings. At that depth, a slow month changes nothing about your household, and a gap between contracts becomes a runway instead of an emergency.

You can tell it's working in the good months. A great month lands, your pay stays level, and the surplus extends the runway. That's what it's for.

Don't smooth with tax money

The set-aside (covered in its own guide) comes off every payment before the buffer sees it. The classic mistake is dipping into ringfenced GST and income tax during a lean patch. That holds up until a due date lands in the same lean patch, and now you can't repay it. Keep three layers, not two: tax aside first, buffer second, lifestyle third.

Shape the income itself

• Invoice more often. Monthly invoicing on long engagements beats invoice-at-the-end; weekly or fortnightly beats monthly where the client will wear it. Smaller, more frequent invoices smooth the inflow at the source and shrink the damage any one late payer can do.
• Prefer retainers where they're honest. A day-a-week retainer alongside project work puts a floor under the month. Price it properly, because a discounted retainer that crowds out better work smooths you downward.
• Milestones and deposits on fixed-scope work turn one end-loaded payment into staged ones, and a deposit filters the clients who were never going to pay promptly (the late-payers guide covers the rest).
• Mind the calendar you already know. NZ client work reliably thins over the summer break; a December-January dip planned for in March is a non-event.

Use credit for timing, not income

A revolving credit facility or overdraft is a useful smoothing tool. It costs nothing when unused, and it's there the moment a timing gap opens. Use it when you know the invoice is coming and you know the date. Don't use it to spend above what the year actually earns. If the drawn balance only ever grows, you're using credit to replace income you haven't made, not to smooth timing.

How Coffer helps

The number that matters for smoothing is how much is genuinely yours to spend, and that's the figure Coffer's dashboard shows. It ringfences your tax as each invoice is paid, so the money for GST and income tax is set aside before you see the balance. You can hold your buffer in pots, and lock a pot for the months you don't trust yourself to leave it alone. Overdraft room shows as headroom, not as spendable cash. Invoices you haven't been paid for yet count as incoming, not as money in hand.