How to build your company's cash flow forecast for 2027

Cash flow planning for 2027 means laying out, month by month, what enters and leaves the account, using the real date the money moves and not the invoice date. The starting point is not a guess, it is your own history: twelve closed months show which months collect less and which ones concentrate cost. On top of that go payroll, the taxes your CPA already flagged, loan payments, annual insurance, license renewals and equipment purchases. Reserve is measured in weeks of fixed expense, and the forecast gets reviewed every month against actuals.

Profit is not cash, and the gap takes down companies that are making money

The P&L, your profit and loss statement, records revenue when the work was delivered and expense when it was incurred. The bank statement records when the money actually moved. Those are two different timelines, and the gap between them is where a company runs out of cash with a positive result.

A simple example. The job finished in March and the invoice went out in March. The March P&L shows the full revenue and the margin on that job. Except the client pays in two installments and the second one lands in May. Three months of payroll are already out the door. The materials were already paid to the supplier. The profit belongs to March. The hole belongs to April.

The faster the company grows, the wider that interval gets. A bigger job burns more payroll and more material before anything is collected. That is why the month with the highest billing is often the month with the least money in the account.

What goes into the forecast, line by line

The forecast is a calendar of money. Every line needs a movement date, not an accounting period.

• Customer collections, by the date they actually land. If your invoice says thirty days and the client historically pays in forty five, the forecast uses forty five. The invoice date is not the money date.
• Payroll, by the pay date. Weekly payrolls mean some months carry an extra run. Those months have to show up on the calendar, or they become a surprise.
• Taxes your CPA already flagged. Amount and date come from them. The forecast only places each one in the right month so the cash is there on the day.
• Loan and equipment finance payments. Note that only interest shows up on the P&L. Principal leaves the bank without touching the result, and that is where looking only at profit misleads people.
• Annual insurance and renewals. Liability insurance, vehicle insurance, license and registration renewals usually come out in one shot, in a single month. Mentally spreading them over twelve does not pay the bill.
• Equipment purchases. They enter with the down payment in the purchase month and the installment in the months after. A purchase decided in December weighs on January and February cash, usually lean months.

Use your own history, not your gut

The question that stops almost everyone is how to know which months of 2027 will be weak. The answer sits in the twelve months you already lived, as long as they are closed and reconciled.

• Take the last twelve closed months and look at what landed in the account in each one, not what was billed.
• Mark the months where collections came in below average. They are almost always the same ones every year.
• Find the cause of each one: fewer jobs sold, a client who paid late, weather, holidays, season. The cause tells you whether it repeats.
• Repeat the pattern on the 2027 calendar and only then adjust for what you already know changes: a new contract, a lost client, a bigger crew.

If the months are not closed, the forecast starts wrong and nobody notices until the error becomes a negative balance. That is why the base of any forecast is a reconciled monthly close, not the spreadsheet.

Construction, restaurants and service businesses do not share the same year

Seasonality is not a detail, it is the shape of your cash curve. And it changes by industry and by state.

• Construction. Cash moves by phase and by draw, not by month. In Massachusetts, snow cuts production in construction and outdoor services, which means summer cash has to carry the winter. If you work job by job, forecast job by job and phase by phase, not only by monthly totals. The construction bookkeeping page shows how job margin feeds this calculation.
• Restaurants. Money comes in almost every day, which is deceptive. The swing is on the cost side: ingredient purchases and shift scheduling rise before traffic does, and payroll does not wait for the slow month to end. A restaurant forecast is weekly, not monthly.
• Recurring services. They look stable and the risk is different: concentration. If two clients account for most of the collections, the forecast has to simulate the month one of them pays late.

In Florida, hurricane season runs from June 1 to November 30 and affects construction, tourism and cash. It is not about predicting a storm, it is about knowing there is a stretch of the year when cancelled schedules and stopped jobs are more likely, and that cash has to cross it.

How much reserve to hold, measured in weeks

Reserve is not a magic amount that works for everyone. It is a number of weeks. Add up what leaves every month regardless of billing: payroll, rent, insurance, loan payments, software, accounting. Divide your account balance by that weekly fixed expense. The result is how many weeks the company can run with the operation stopped.

The target comes from your own history, not from an internet rule. If your worst stretch last year lasted three months, the reserve has to cross three months. If your operation stops for two weeks a year, the target is different. Measuring in weeks has a practical advantage: when payroll grows, the number of weeks drops on its own and the warning shows up before the problem does.

The forecast is only worth it if you review it every month

A forecast built in December and filed away is a document. A forecast compared to actuals every month is a tool. The routine is short: once the month closes, put the projection next to what really came in and went out, and look only at the lines that landed far off.

Every difference has an explanation and every explanation corrects the months ahead. A client who paid fifteen days late will probably do it again. An expense that showed up and was not on the list has to go in for the whole year. After three or four months of review, the forecast starts missing by little, and that is when it becomes useful for hiring, buying and pricing decisions.

GS Brasil builds and reviews this forecast alongside the monthly close, inside Financial Support Premium, which includes cash, margin and KPI tracking through the year. The work is remote, for companies in Florida and Massachusetts, and no forecast replaces the tax conversation with your CPA.