Oliver Bennett
When your income doesn't arrive evenly
If you run a café in a seaside town, a wedding photographer, a heating engineer or an events florist, you already know the feeling. One month the bank balance looks healthy enough to plan a kitchen extension; three months later you're checking the balance before filling the van with diesel. Seasonal and irregular income isn't a sign that you're bad at business. It's a cash-flow shape that needs managing deliberately.
The trouble is that most of the financial systems small businesses are handed — monthly budgets, direct debits, standard payroll — assume money comes in steadily. When it doesn't, many owners end up spending freely in the lean months and hoarding anxiously in the busy ones, which is the exact opposite of what works. A handful of habits, put in place once, will smooth the whole year out.
Build a reserve while the money is flowing
Ask most seasonal business owners how much reserve they need and you'll get a vague answer, usually somewhere between "a few grand" and "as much as possible". A more useful starting point is to work out your survival number: the total of unavoidable costs in your quietest month. That means rent and business rates, utilities, insurance, minimum loan repayments, software subscriptions, accountant's fees and your own basic household draw.
Multiply that figure by the number of lean months you typically face, then add a buffer of one more month. That is your reserve target — not a vague aspiration, but a number you can track.
Then, during peak months, move a fixed percentage of every receipt into a separate account. Ten per cent is a reasonable starting point; twenty per cent is better if your quiet season is long. Keep it somewhere you can reach within a day or two. An instant-access savings account at your existing bank is usually enough, though it's worth shopping around. A notice account with a 30 or 60-day term suits money you genuinely won't touch until spring.
Don't wait until month end to move it across. Set a standing order for the day your busiest income tends to land, or transfer it manually the moment a large invoice clears. Money that gets moved first tends to stay put.
Put tax money aside as you earn it
HMRC is not sympathetic to the fact that January was quiet. Tax is calculated on annual profits, but it becomes payable on fixed dates regardless of what your bank account looks like that week. If you're self-employed, payments on account usually fall due on 31 January and 31 July. Limited companies face corporation tax nine months and one day after their accounting period ends, and VAT returns are generally due one month and seven days after each quarter closes.
Work out a personal tax percentage and apply it to every payment that comes in. For a sole trader, somewhere between 25 and 30 per cent of profit is a sensible ballpark once income tax and Class 4 National Insurance are counted, and more if profits reach the higher rate band. Treat that slice as though it were never yours:
- Income tax and National Insurance on your profits
- VAT output tax, if you're registered — it was never your money to spend
- Corporation tax, if you trade through a company
- Payroll taxes and pension contributions due on wages you pay yourself or staff
A separate tax account, fed weekly or monthly, turns a frightening January bill into a routine transfer.
Pay yourself a steady wage from a variable pot
The most effective trick for irregular income is to stop paying yourself whatever happens to be left. Set a modest, fixed monthly draw based on your worst realistic quarter, not your best one. In strong months, the surplus tops up the reserve rather than your lifestyle.
Your household budget then becomes predictable, which matters more than most business owners admit. Money worries in a quiet February have a habit of turning into poor decisions: discounting too heavily, taking on the wrong client, delaying maintenance that later costs more.
Apply the same logic to larger purchases. If a new machine, vehicle or website rebuild can wait, schedule it for a month that can genuinely afford it — and if the busy season underperforms, delay it without guilt.
Plan around HMRC's dates, not just your own
Payments on account catch people out every year. HMRC asks for half of your previous year's bill up front, twice, which means your first profitable year can leave you with a bill plus two instalments. If profits have genuinely fallen, you can ask to reduce them — but reduce too far and you'll pay interest, so only do it with figures you trust.
Write every tax date into a twelve-month cash-flow forecast alongside your expected income. Even a simple spreadsheet with money in, money out and a closing balance, updated monthly, will show you a shortfall six weeks before it arrives rather than the day it does.
Keep records that make the pattern visible
Bookkeeping little and often, rather than in a panic before the filing deadline, gives you something more valuable than tidy records: a comparison. This March against last March. This Christmas quarter against the previous one. Patterns emerge, and you can plan around them instead of being surprised by them.
If your profits swing widely, ask your accountant about reliefs designed for exactly that situation. The averaging rules for creative professionals and farmers, for example, allow profits to be spread across two years, which can keep you out of a higher tax band in a single bumper year. There may also be sensible arguments for changing your accounting date or your VAT scheme.
None of this needs to be complicated. A separate savings account, a standing order, a percentage you apply consistently and a forecast you actually look at will carry you through most of what seasonal trading throws at you.
