How to build a cash reserve that actually covers dry months

The dry month isn’t a surprise. You can usually see it coming — a project ending with no replacement lined up, a season you know is slow, a holiday that kills two weeks of billable time. The problem isn’t the timing. It’s that the money to get through it isn’t already set aside.

A cash reserve converts a cash crisis into an inconvenience. That’s its entire job.

What three months actually means

The target isn’t three months of your average invoiced revenue. That number is too high to build and larger than you need.

It’s three months of your fixed costs — rent, utilities, insurance, essential subscriptions, food and transport. The amount required to keep the lights on if you didn’t bill anything for 90 days.

Calculate it: list every fixed outgoing you’d keep even if you stopped working. For most freelancers working from home without staff, this number is €1,500 to €2,500 per month. Three months of reserve is €4,500 to €7,500 — a specific, achievable target, not a vague “save more.”

How to build it without changing anything

The simplest method is a second automatic transfer, separate from your tax provision.

After you account for 30% on each invoice, route 10% of net received toward a reserve account — every month, without exception — until you hit the target. At €3,500 net monthly income, that’s €350 per month. You reach a €6,000 target in 17 months.

The key is that the account is separate and boring. Not an investment account, not something you optimise. A balance that grows until it hits the number, then stops.

When you draw from it

Drawing from the reserve doesn’t mean stopping contributions. It means a debt that gets repaid at the same rate — 10% of net received — until the balance is back to target.

The reserve depletes quickly and rebuilds slowly. That’s fine. The structure is the point. A client paying 60 days late on top of a slow month will deplete the reserve. The same discipline that built it rebuilds it. How to build the system that keeps income stable even when projects don’t.

The forecast connection

A cash reserve absorbs slow months. A revenue forecast shortens how many you need to absorb.

Your calendar events already contain that signal. Missions booked into next month mean next month’s revenue is largely known today. A calendar with gaps in December makes December’s shortfall visible in October — while there’s still time to fill it.

Reading upcoming calendar events as a forward revenue forecast turns the reserve calculation into something you can update before the slow period starts, not after it ends.

The reserve and the forecast complement each other. The forecast tells you the slow month is forming before it arrives. The reserve covers what the forecast couldn’t prevent.

The months you already know

August is quiet. December is half-lost. The month after you finish a long project without having pipelined the next one. These aren’t surprises.

A reserve that’s full going into August is different from a reserve still rebuilding from February.

Running the transfer year-round — including in good months — means the buffer is intact when the predictable slow periods arrive. How to manage cash flow when revenue varies month to month.

Timescanner reads upcoming calendar events to show what you’re likely to invoice next month and the month after. Two weeks of warning is enough to accelerate prospecting before the gap arrives. Works with any iCal-compatible calendar.