Your January Self Needs a Favour: The 30-Minute Cash Cushion Sprint

There’s a strange trick January plays on solo businesses. December 2026 might be your busiest run of the year — orders, enquiries, last-minute bookings, clients wanting everything before the break. Then the inbox goes quiet, the bank balance looks healthy for about five minutes, and a stack of bills arrives anyway.

That’s not a failure of planning. It’s just how a one-person business can feel when revenue is lumpy and personal and business costs share the same mental space.

The aim of this 30-minute sprint is not to predict the future. It’s to turn “January might be tight” into a number you can do something about. You’ll need a pen, one sheet of paper, your banking app and a timer. No spreadsheet. No heroic budgeting.

First, protect the money that isn’t yours

Before you build any kind of cushion, make sure you’re not counting tax money as spare cash. If you’re VAT registered, the VAT you collect belongs to HMRC. If you have a Self Assessment bill due on 31 January, that’s already spoken for. The same goes for PAYE if you employ anyone.

A cash cushion sits on top of those obligations, not instead of them. This sounds obvious until you’re staring at a healthy-looking balance in mid-December and forgetting that a chunk of it is just passing through.

Why January catches sole traders out

January is bill-heavy in a very British way. There’s the Self Assessment deadline, sometimes a payment on account, council tax if you pay over ten months, energy costs after the festive period, insurance renewals, software subscriptions and the annual accountant bill. Personal costs don’t pause either: food, transport, mortgage or rent, childcare, phone, debt repayments.

At the same time, work can slow down. Clients recover from the break. Decisions get pushed to “the end of the month.” Invoices sent in December may not be paid until late January. Even a good December can leave you feeling oddly exposed by the second week of the new year.

You don’t need to fix all of that in one sitting. You just need a working estimate and a small plan.

The 30-minute cash cushion sprint

Set a timer for 30 minutes. Draw four boxes on your sheet of paper. If you prefer, use a note on your phone — but paper is often faster because you can’t get distracted by notifications.

1. List the first six weeks of costs (10 minutes)

Write two columns: Business and Personal. Put down the costs you know are coming from 1 January to around mid-February. You don’t need every coffee. Focus on the bills that would hurt if they landed together.

Business examples: rent or desk space, insurance, software, accountancy fees, bank charges, loan repayments, stock, marketing, VAT, PAYE, Self Assessment, professional memberships.

Personal examples: mortgage or rent, council tax, energy, water, food, transport, phone, childcare, subscriptions, debt payments.

Mark each one as fixed or movable. Fixed means it has to be paid. Movable means you could pause it, reduce it or delay it without causing real damage.

2. Add a realistic income line (5 minutes)

Now look at what you actually expect to come in during those same six weeks. Be boringly realistic. Include confirmed work, regular retainers and invoices that are already due. Don’t include the big maybe-client who said “let’s talk in the new year.”

A useful check: look at your last two Januaries. Not to scare yourself, just to see the pattern. If January is usually slower than December, build that into your number.

3. Do one subtraction (5 minutes)

Take your total six-week costs and subtract your realistic six-week income. That’s your gap.

If the gap is zero or negative, brilliant — but still aim for a small cushion of one week’s essential costs. Quiet months have a way of producing surprise bills.

If the gap is positive, don’t try to cover all of it at once. Pick a first target you can actually hit. Half the gap is a good first pass. So if you reckon the gap is £2,400, a target of £1,200 is a real win. Write that number at the top of the page. That’s your cash cushion target.

4. Choose two low-friction moves (10 minutes)

This is the important bit: choose two moves, not five. A plan you’ll actually follow beats a perfect plan that lasts three days.

Pick from these:

• Open a separate savings account and move 5–10% of every December invoice into it as it arrives.
• Ask for a deposit or 50% upfront on December bookings, especially if the work is bespoke or uses your time.
• Send December invoices earlier than usual, with a clear due date, and diarise a polite follow-up.
• Pause one or two subscriptions for January and February. Software you barely use, a membership you keep forgetting about, a delivery pass.
• Set a weekly 10-minute money check for December so you can see the cushion building rather than guessing.
• Ask your accountant about the timing of payments on account and any bills landing in January. A quick email now is cheaper than a scramble later.

Write your two chosen moves on the sheet. Add the dates you’ll do them. That’s the whole plan.

What your one-page worksheet looks like

By the end, the page should show:

• Six-week business costs: £______
• Six-week personal costs: £______
• Realistic six-week income: £______
• Gap: £______
• Cash cushion target: £______
• Move one: ______________________
• Move two: ______________________
• Review date: ____________________

Stick it somewhere visible. A fridge door is fine. So is the inside of your work notebook.

The calm rule that keeps it useful

Don’t raid VAT or tax money to build the cushion. Don’t quietly rely on a credit card and call it a buffer. And don’t treat the target as a forecast — it’s just a kindness to your future self.

Review the page on 15 December. If December has been stronger than expected, move a little more across. If it’s been slower, shrink the target rather than abandoning the whole idea.

January does not need to be a heroic test of endurance. A small, separate pot of money and two sensible moves can take the sharp edge off the quiet weeks. That’s a favour worth doing now, while December 2026 is still busy enough to distract you.