The winter cashflow squeeze, and the August bill that makes it worse

For a lot of Kiwi businesses, winter is the quiet stretch. Sales slow down, customers take a bit longer to pay, and the phone rings less than it did in autumn. Meanwhile the rent, the wages, the software subscriptions and the power bill all carry on exactly as before.

That mismatch has a name. It is the gap between money coming in and money going out, and winter is when it tends to open up the widest.

Then, right in the middle of it, late August arrives with a provisional tax instalment. For many business owners, that is the moment a manageable squeeze turns into a genuine scramble.

The good news is that none of this is a surprise. You can see all of it coming from here in June. So let us walk through what is actually happening, and what you can do now to stay in front of it.

Why winter tightens the screws

First, it helps to be clear on the difference between profit and cash, because they are not the same thing.

Profit is what is left after you take your costs off your sales, on paper. Cash is what is actually sitting in your bank account on any given day. They can tell very different stories, especially when your customers pay on 30 or 60 day terms.

Here is how that plays out in winter. Say you invoice a job in June, but the customer does not pay until August. On paper, June looks profitable. In reality, your account is thin in June and July while you wait. If sales have also dipped, you have less new money flowing in to cover the gap. Your fixed costs do not dip with the season, so the buffer gets stretched.

This is the working capital cycle, the time it takes for a dollar to travel from "spent on doing the work" to "back in your account as payment". The longer that cycle, the more cash you need on hand just to keep the lights on. Winter quietly stretches it out.

Then comes 28 August

On top of all that, businesses with a standard 31 March balance date have their first provisional tax instalment due on 28 August.

Provisional tax catches a lot of owners out, so it is worth understanding properly. It is not an extra tax. It is simply you paying this year's income tax in instalments through the year, rather than in one lump at the end. Under the standard method, that first instalment is usually based on last year's tax bill plus a small uplift.

See the trap? The instalment is calculated on last year. If last year was strong and this year is quieter, you can be asked to hand over a sizeable payment at the exact moment your cashflow is at its tightest, based on profits you may not be making right now.

That is how a profitable business ends up feeling broke in late winter. Not because anything has gone wrong, but because the timing of money in, money out, and tax all stack up in the same few weeks.

What to do about it now

The owners who sail through winter are not the ones with the most money. They are the ones who saw it coming and planned. Here is where to start.

• Look forward, not just back. Map out your expected income and expenses across June to September. You do not need anything fancy. Even a simple month by month forecast will show you where the dip lands and how deep it goes.
• Set the tax aside before you need it. Once you know roughly what the August instalment will be, start putting money away now. A separate account you do not touch works well. Tax you have already set aside is tax that cannot wreck your winter.
• Check whether last year still reflects this year. If your income has genuinely dropped, you may be paying provisional tax on profits you are not making. There are options here, including estimating your tax down, but they carry risk if you get the estimate wrong. This is exactly the kind of call worth talking through with us before you make it.
• Tidy up your debtors. The faster your customers pay, the shorter your working capital cycle, and the more cash you have when you need it. Chasing an overdue invoice in June is far less painful than scrambling for cash in August.

You can plan your way through this

Winter cashflow is not about luck. It is about knowing your numbers far enough ahead that nothing lands as a shock. When you can see the dip and the tax bill coming, you can prepare for both calmly, instead of reacting to them.