Managing Cash Flow When Sales Are Uneven

Start by accepting the shape of your year

Uneven sales are not a sign that you are doing something wrong. Plenty of perfectly healthy UK businesses earn most of their money in a handful of weeks: a wedding photographer, a heating engineer, a children's party entertainer, a shop that lives for December. The trouble is not the peaks and troughs themselves — it is that your outgoings do not follow the same rhythm. Rent, insurance, software subscriptions, accountancy fees, loan repayments and your own household bills arrive on a steady monthly drumbeat whether the phone rang this week or not.

That mismatch is what creates the squeeze. A strong month can feel like a windfall and quietly get spent, then a weak month arrives with nothing behind it. The fix is not to work harder in the quiet weeks. It is to build a small set of habits that smooth the money as it moves through the business.

Build a rolling 13-week cash forecast

A cash flow forecast sounds like something you need a spreadsheet course to attempt. In practice, the useful version is deliberately simple. A 13-week view works well because it is long enough to see a seasonal dip coming, but short enough that you are dealing with real numbers rather than guesses.

• List every week across the next quarter and, for each one, note the money you confidently expect in and the money you know goes out.
• For money in, use expected payment dates, not invoice dates. If a customer routinely pays 45 days late, forecast it 45 days late and be pleasantly surprised if it lands sooner.
• For money out, include the obvious things — wages, rent, supplier invoices — but also the ones people forget: VAT, PAYE, quarterly insurance instalments, professional memberships, annual software renewals.
• Update it every Friday with actual figures. Ten minutes a week is enough, and the forecast gets sharper each time.

The point of the forecast is not accuracy for its own sake. It is that you can see a tight week four weeks out, while you still have time to do something about it.

Put tax money out of reach the moment it arrives

Almost every cash flow crisis I see in small firms starts with tax money that has already been spent. VAT, PAYE and Corporation Tax are not your money; they are money you are holding on someone else's behalf, and the bill always turns up.

The simplest habit is a separate savings account and a fixed percentage skimmed off every payment that lands. A VAT-registered business on a standard 20% rate might move roughly 16.7% of each VAT-inclusive receipt aside, so the quarter's bill is already sitting there. If you are self-employed and make payments on account, work out the annual figure, divide by twelve, and treat it as a standing monthly cost.

If a tax bill does catch you short, speak to HMRC early rather than ignoring it. Payment arrangements are far easier to agree before a deadline than after one.

Tighten the outgoings you actually control

You cannot control when customers buy, but you have much more sway over when you pay than most owners realise.

• Audit your direct debits. Open your bank statement and list every recurring payment. Most businesses find two or three subscriptions they have not used in months.
• Negotiate supplier terms. Moving from payment on delivery to 30 days, or spreading a large annual premium over monthly instalments, can free up more cash than a modest price cut.
• Ask about settlement discounts. If a supplier offers 2% off for payment within ten days, that is worth more than it looks — but only take it if the cash is genuinely spare.
• Buy big-ticket items in your strong season, not your weak one. A van, a machine or a shop refit is far easier to fund in a good month.

Small, dull savings compound. Cutting £300 a month of waste is the same as winning a £3,600 contract, except it takes an afternoon instead of a quarter.

Get paid faster without souring relationships

Slow payment is the most common hidden cause of uneven cash. If your average customer takes 60 days, you are effectively lending them your working capital for free.

Set clear expectations before the work starts: deposit on booking, staged payments on longer jobs, balance due on completion. For regular clients, move to a monthly retainer so income becomes predictable even when project work is lumpy. Send invoices the day the work is done, not at month end, and make it easy to pay with a link or bank transfer details printed clearly on the invoice.

Then be politely persistent. A friendly reminder three days before a due date, and a short follow-up the day after, recovers a surprising amount without any awkwardness.

Arrange breathing room before you need it

Credit is a fair-weather friend. Banks, invoice finance providers and even your own suppliers are far more willing to help when your figures look healthy than when you are desperate in week nine of a drought.

So arrange your safety net in advance. That might be an overdraft facility you rarely touch, an invoice financing arrangement for larger contracts, or a credit card kept empty for genuine emergencies. Aim to hold a cash buffer covering two to three months of fixed costs, built up in £250 increments during the good weeks.

Finally, pay yourself a steady amount. Owners who draw heavily in a strong month and nothing in a weak one end up subsidising the business from their household budget — the fastest route to resentment and burnout. A predictable salary, reviewed twice a year, keeps the business honest and your home life calm. Uneven sales will always be part of the picture; uneven cash flow does not have to be.