Capacity Planning: How to Know When You Can Afford the Next Hire

"Can I afford to hire someone?" is the question owners ask, and it's usually the wrong one. It frames a growth decision as a cost decision, gets answered by gut feel about the bank balance, and produces both kinds of error: the business that hires too late and burns out the team (the common one), and the business that hires on optimism and meets a cash crunch within months. Capacity planning reframes the decision as arithmetic you can actually run. Four steps.

Name the job the role does

Be ruthless about which of three jobs a proposed role performs, because the maths differs for each.

• Capacity hires let you serve demand you're already turning away or under-serving. This is revenue you can name: the enquiries declined, the lead times blown out, the jobs never quoted. These are the easiest hires to justify and the ones owners delay longest.
• Leverage hires buy back expensive time, most often the owner's, by taking on work far below the value of the person currently doing it. The return is whatever the freed time produces, which means it's only real if the time is genuinely redeployed. Buying back owner time is a discipline in its own right, and it's the territory covered in reducing founder dependency.
• Capability hires add something the business can't currently do. Highest potential, slowest payback, most genuine uncertainty. Fund these from strength, not hope.

If you can't say crisply which of the three a proposed role is, you're not ready to run numbers on it.

Build the fully-loaded cost

The advertised salary is the sticker, not the price. The real figure adds superannuation at the current guarantee rate, workers' compensation at your industry's premium, the cost of paid leave and public holidays, equipment and software seats, recruitment, and the ramp drag on whoever trains the newcomer. If your total wage bill sits anywhere near your state's payroll tax threshold, model that too; your state revenue office publishes the current settings.

Don't lean on a remembered rule of thumb here. Have your accountant or bookkeeper price the on-costs against current rates for your state and industry. It's an hour of their time, and it turns a guess into a figure you can plan against.

Fund the bridge, not just the salary

The costs start in week one. The returns ramp over months, as the hire learns your business and works up to full contribution. That gap between outflow and payback is the bridge, and the bridge, not the salary, is what your bank balance actually has to answer for. Estimate how many months until the role plausibly covers its own cost, total the net outflow across those months, and hold that figure against your cash position and pipeline. This is why an affordable salary can still be an unaffordable hire in a lean quarter, and why the timing of a good hire matters almost as much as the decision itself.

Replace "it feels busy" with trigger evidence

Gut feel runs hot in busy weeks and cold in slow ones, so anchor the decision to indicators you can read off numbers you already have: lead times stretching beyond what customers will tolerate, work declined for capacity rather than fit, overtime that has become structural rather than seasonal, rework or quality slippage creeping in, the owner spending whole days on work anyone could do. One busy fortnight proves nothing; the same signals sustained across months are a demand pattern, and demand patterns are what justify capacity.

Run the arithmetic both ways

The final step is to cost the alternative, because "don't hire" is not free. Turned-away revenue compounds as those customers settle in with competitors. A stretched team eventually breaks, and replacing a burnt-out good performer costs far more than relieving them would have. And an owner operating at the ceiling of their hours caps the growth of everything else.

So the decision standard looks like this: a capacity hire is justified by demand you can name, a leverage hire by a written plan for the freed time, and a capability hire by strategy plus a cash buffer that can carry the longer bridge. For the wider view on building a team deliberately rather than reactively, our People hub takes it from here. Hiring always carries some uncertainty; capacity planning just makes sure it's uncertainty you chose with your eyes open.