Cash flow for contractors: smoothing the lumps

Contractor income isn't smaller than a salary, it's lumpier: the same yearly total arrives as feast months, famine months, invoices paid late, and the occasional gap between contracts. Most contractor money stress is that shape, not the amount. Smoothing it is a solved problem with about five moving parts, and none of them require earning more.

The buffer: your own salary fund

The core move is separating earning from spending: income lands in the business account on the market's schedule, and you pay yourself a level monthly amount from it on yours. 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.

The test of the system is boring months: when a great month lands and your pay stays level, the surplus is quietly extending the runway, which is exactly what it's for.

Tax money is not smoothing material

The set-aside (covered in its own guide) comes off every payment before the buffer sees it. The classic smoothing failure is treating ringfenced GST and income tax as buffer during a lean patch: it works right up until the due date arrives mid-drought, which is precisely when it can't be repaid. Two separations, not one: 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; 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.

Credit: headroom, not income

A revolving credit facility or overdraft can be genuinely useful smoothing infrastructure: cheap when unused, instant when a timing gap opens. The discipline is using it for timing (the invoice is coming, the date is known) rather than for level (spending above what the year actually earns). Drawn balance that only ever grows is income replacement wearing a smoothing costume.

How Coffer helps

Smoothing runs on one number: what's actually yours. Coffer's dashboard holds that line: tax ringfenced per payment, pots for the buffer itself (with a hard lock for the months willpower needs help), overdraft headroom shown as headroom rather than as money, and pending invoices tracked as incoming rather than counted before they land. The lumps still come; they just stop reaching your spending decisions.