Stop running your business on gut feel: why forecasting changes everything
How a 12-month rolling forecast helps business owners make smarter decisions, protect cash flow, and build companies worth owning
Most business owners check their financials after the fact. They pull up the profit and loss statement to see what happened last month and then hope the next month looks better.
The companies that scale consistently do something fundamentally different. They do not just look backward. They plan forward.
In a recent episode of Profit, Grow, Exit, host Abi Walsh sat down with Michelle Scribner, CEO of Sum of All Numbers, and Shawn Walsh of Encore Strategic to break down exactly how forecasting works, why most entrepreneurs avoid it, and what changes when they finally commit to it.
Here is what came out of that conversation.
Why your financials are not enough
Financial statements are essential. But they are always telling you about the past.
When you look at a profit and loss report, you are looking in the rearview mirror. What happened has already happened. The IRS requires those numbers to stay exactly as they are. You do not adjust them. You learn from them.
A forecast is different. A forecast takes what you already know about your business, your revenue patterns, your expense cycles, your planned hires, your growth goals, and uses that information to build a picture of the next 12 months. Not a perfect prediction. A working plan that gets refined every single month.
The most important thing a forecast does is give you time. If a cash flow problem is going to hit the business in eight months, a forecast shows it to you now. Eight months out, there are options. Eight months later, there is only damage control.
Most business owners are running their companies based on whatever is sitting in the checking account on the day a decision needs to be made. That is not financial management. That is hope dressed up as strategy.
What Profit First has to do with forecasting
Michelle built all of her forecasting work on the principles of Profit First, and the connection is not incidental. It is structural.
The core problem Profit First solves is behavioral. Entrepreneurs are optimistic by nature. Revenue comes in and it feels like abundance. Decisions get made based on that feeling. Then the bills arrive, the payroll runs, the annual subscriptions renew, and the feeling was wrong.
Profit First changes the structure so behavior follows automatically. When money comes in, profit and owner pay come out first. The business then runs on what is left. The operating budget is constrained intentionally, not by discipline alone but by design.
Michelle uses the analogy of a smaller plate at a meal. When the plate is smaller, people eat less. Not because they tried harder. Because the structure changed.
The same logic applies directly to forecasting. When every forecast starts by allocating only 65 percent of projected revenue to operating expenses, every other decision in the model gets made within a structure that protects profit and owner compensation from the start. The question is never "did we make enough to pay ourselves?" The question becomes "how do we operate well within what has already been set aside?"
For businesses generating over a million dollars in revenue, that 65 percent operating expense target is the benchmark Michelle uses as a starting point. The remaining 35 percent is for the owner, for profit, for taxes. It is not aspirational. It is built into the model before a single expense line is filled in.
The forecasting mistakes that derail most business owners
Understanding what a forecast is supposed to do is one thing. Building one that actually works is another. Michelle shared the most common mistakes she sees, and they are specific enough to be immediately useful.
Treating it like a budget and abandoning it when things go off track.
This is the most common pattern. A business owner builds a forecast, misses a target in month three, and treats the miss as evidence that the forecast does not work. They walk away from it the same way people abandon a diet after one bad week.
A forecast is not a performance standard. It is a navigation tool. When something goes off target, the question is not how badly did we miss. The question is why did we miss, what does that tell us about the next three months, and what do we adjust right now. The miss is useful information. Abandoning the forecast because of it is throwing away the most valuable data the business produced that month.
Averaging expenses across months instead of placing them where they land.
Annual subscriptions, insurance renewals, license fees, and equipment costs do not spread evenly across 12 months. They land in specific months. When those expenses get averaged out in a forecast, the months where they actually hit look artificially better than they are. Business owners see a cleaner-looking bank balance in October and make spending decisions they cannot actually afford.
The fix is straightforward but requires attention to detail. Every expense goes in the month it will actually be paid. An annual Zoom subscription that renews in August belongs in August. Not divided by 12. In August. That specificity is what makes a forecast useful for actual decision-making rather than just producing a number to stare at.
Planning new hires and revenue growth in the same month.
Entrepreneurs tend to be optimistic about the timeline between adding a person and seeing the revenue impact of that addition. In reality, a new hire takes approximately 90 days to generate meaningful revenue contribution. The hiring costs, training time, and onboarding investment all land before the return does.
A forecast that puts the hire and the revenue increase in the same month is not a forecast. It is wishful thinking formatted as a spreadsheet. Building the actual lag into the model gives a much more accurate picture of what the cash position will look like during the transition and whether the business can afford it.
Leaving out debt payments.
Debt payments do not appear on the profit and loss statement. They come directly out of cash. A forecast that does not include every scheduled debt payment is missing one of the most significant drains on cash flow. Including those payments in the monthly model also reveals something useful: the exact month when a debt will be eliminated and how much additional cash flow that frees up going forward.
What the forecast actually helps you decide
Once a working forecast is in place, the decisions it supports become much clearer and significantly less emotional.
When the model shows the business will be $4,000 short in a specific month, the conversation changes from "can we afford this?" to "which of these three things do we cut to protect payroll and owner pay?" That is not a harder decision. It is actually an easier one, because the data removes the ambiguity that makes financial decisions feel so difficult.
Michelle describes every business decision as ultimately a math problem. The business either has the cash to do something while still paying its people and its obligations, or it does not. When the forecast is current and accurate, the answer to that question is always visible before the decision has to be made.
The forecast also supports longer-horizon planning. When a business owner wants to expand, open a new location, or make a significant investment, the model shows what that decision does to cash position across the next 12 months. Not conceptually. In actual monthly numbers. That visibility changes the quality of the decision entirely.
Forecasting for businesses that are not yet profitable
One of the most important moments in the conversation came when the question of forecasting for early-stage or currently unprofitable businesses came up.
Michelle's answer was direct: a forecast is arguably more important for a business that is not yet profitable than for one that is.
For a business that launched on a loan, an investor contribution, or personal savings, the most critical number is runway. How many months until the cash runs out? A forecast built on actual spend data shows that number specifically, not as an estimate but as a calculation. When that number is visible, every decision gets made in the context of protecting or extending the runway rather than in the context of optimism.
Michelle described working with clients who were developing apps and convinced the launch was always just around the corner. Rather than telling them how long their money would last and watching them dismiss the warning, she would ask them to choose a date. A date far enough out that there was no emotion attached to it yet. A date by which the product had to be viable or the investment would stop.
Then that date went into the forecast. Every month, the business owner watched it get closer. The awareness that the date was approaching changed how decisions got made. Resources went to the right places. Focus sharpened. And the pattern, almost without exception, was that the deadline got met.
Having a specific, written, visible date in a living financial model produces a different quality of focus than any amount of encouragement or advice.
The bookkeeping habits that make forecasting work
A forecast is only as accurate as the data it is built on. That means the quality of bookkeeping underneath it matters significantly.
The most important bookkeeping habit for forecasting is granularity in the chart of accounts. When every revenue stream has its own account and every major cost category is separated clearly, the forecast can be built with enough specificity to be genuinely useful.
Shawn described a client whose overall profitability was off target, but when they looked at individual revenue streams, every line was hitting its forecast except one: project revenue. That specificity meant the solution was not go find more clients. It was go find more projects. The right chart of accounts produced the right diagnosis.
Michelle also distinguishes between accrual-based bookkeeping, which spreads expenses across the periods they relate to, and the cash-based approach she uses for forecasting. For a forecast designed to answer the question of whether there will be enough cash, she wants to know when the money actually moves. Not when it is recognized. When it leaves the account.
That distinction matters most for large annual expenses. In bookkeeping, those expenses get spread. In forecasting, they land in the month they are paid. That difference is what makes the forecast an accurate representation of the actual cash experience of running the business month to month.
Where to start this week
For business owners who have never built a forecast, the starting point does not need to be complicated.
Pull the last 12 months of financial data. Look at two things: total revenue and total operating expenses. Calculate what percentage of revenue went to expenses.
Then ask one question: what would change if that percentage were one percent lower?
That one percent belongs to the owner. Every percentage point that does not go to operating expenses goes into the owner's pocket. Seeing what one percent actually represents in dollar terms, whether it is $1,000 or $10,000 or more, makes the goal concrete in a way that abstract conversations about profitability never do.
Start there. Build the curiosity. Ask where one percent could come from. Then ask what another percent per quarter would look like.
By the end of the first quarter of thinking this way, most business owners are ready to go deeper. The data becomes interesting instead of intimidating. The forecast stops being a thing they know they should do and becomes a tool they actually want.
That shift is what sustainable financial clarity looks like in practice.
Want to know what a 12-month rolling forecast would reveal about your business right now?
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