Nomsa runs a beachfront café in Cape Town. From December to February the tills never stop, and she barely keeps up with supplier invoices. By June she is staring at a bank balance of R8 400, rent of R22 000 due on the first and a SARS provisional tax payment on the horizon. Her accountant says it was a great year. Her bank account disagrees. If your income rises and falls with the seasons, cash flow forecasting for seasonal businesses is what separates a profitable year from a stressful one. Here is how to build a forecast that carries you through the quiet months.

Why Seasonal Businesses Struggle With Cash Flow

Profit and cash are not the same thing. Profit is what remains after expenses on paper. Cash flow is the actual movement of money in and out of your bank account. A seasonal business can post a healthy annual profit and still run dry in month eight, because rent, salaries and insurance arrive every month while income arrives in bursts.

This pattern is everywhere in South Africa: Cape Town hospitality in summer, Durban restaurants over the December holidays, Johannesburg retailers before Black Friday, farmers around harvest, and school-uniform suppliers in January. The busy season is rarely the problem. The gap between what you earn and what you need to spend in the quiet months is.

How to Build a 12-Month Cash Flow Forecast

A cash flow forecast is a month-by-month projection of the money you expect to receive and pay out. Follow these steps:

1. Gather 24 months of history. Pull bank statements or run a cash flow report from Sage, Xero or QuickBooks. Two years shows whether your peaks and troughs repeat.

2. Map your income by month. Start with last year’s actuals, then adjust for realistic growth or decline. Record when customers actually pay, not when you invoice them.

3. List your fixed costs. These include rent, salaries, loan repayments, insurance and software subscriptions. They hit every month, whatever your turnover.

4. Add variable and seasonal costs. Stock purchases ahead of peak season, temporary staff and marketing campaigns all belong here.

5. Include tax and statutory payments. Add VAT returns, PAYE, UIF and SDL (due by the 7th of the following month) and provisional tax (end of August and end of February). These are non-negotiable, and missing them attracts penalties and interest from SARS.

6. Calculate the closing balance for each month. Take your opening balance, add expected income, subtract expected payments, and carry the result into the next month.

Look for the months where the closing balance turns negative. That is your forecast shortfall, and it tells you exactly how much cushion you need.

Building a Cash Buffer for the Off-Season

Once you can see the dip coming, you can plan for it instead of reacting to it.

• Set a buffer target. Find the largest cumulative shortfall in your forecast and aim to hold at least that amount in a separate savings account by the end of peak season.

• Pay yourself on a smoothed basis. Rather than drawing heavily in December, set a steady monthly drawing or salary that your annual cash flow can support.

• Negotiate supplier terms. Ask for 60 days instead of 30 during quiet months, or agree on seasonal payment schedules before you need them.

• Collect faster. Request deposits, send invoices immediately and follow up on overdue debtors. Late-paying customers hurt most when your own income is already thin.

• Create off-season revenue. Nomsa’s café started offering winter corporate lunches and catering platters, which covered her fixed costs through June and July.

• Arrange credit before you need it. Banks lend more readily when your statements look healthy. An overdraft or business credit facility set up in peak season is far easier to secure than one requested in a crisis.

Remember that not all the money in your account during peak season belongs to you. VAT collected, PAYE withheld and provisional tax owed are SARS’s money, so set them aside as you earn it.

Common Cash Flow Forecasting Mistakes to Avoid

Being too optimistic about peak revenue. Build three scenarios: best case, expected and worst case. If a weak season would sink you, you need a bigger buffer.

Forgetting the tax portion. Picture a Durban restaurant owner who banks R300 000 in December and treats it all as spendable. Roughly 15% of VAT-inclusive sales belongs to SARS, and a provisional tax bill follows in February. Spending it all leaves a hole when those bills arrive.

Treating the forecast as a once-off exercise. A forecast goes stale quickly. Compare it with actual results every month and adjust the following months accordingly.

Mixing personal and business money. When household expenses flow through the business account, your forecast becomes unreliable and your real shortfall stays hidden.

When to Get Professional Help With Your Forecast

A forecast is only as reliable as the books behind it. If your bookkeeping is weeks behind, your numbers will mislead you. This is where outsourcing your bookkeeping to a professional firm pays for itself. Saber Accounting’s team keeps your records current in Xero, Sage or QuickBooks and builds forecasts around your actual trading pattern, including VAT, payroll and provisional tax dates. You see the cash crunch months ahead of time, not the week it arrives.

Plan for the Quiet Months While the Tills Are Busy

Seasonal income is not a weakness, but it demands planning. A realistic forecast, a ring-fenced buffer and tax money set aside early turn the off-season from a threat into something you have already budgeted for. For South African small business owners, that planning is often what keeps a profitable business solvent in a slow winter.

Ready to get your finances in order?
At Saber Accounting, we help South African small businesses stay compliant, cut unnecessary costs, and make smarter financial decisions. Whether you need help with cash flow forecasting, bookkeeping or tax planning, our expert team is here.
👉 Book a free consultation today