Most owners build an H2 revenue forecast for a small business the same way: copy last year’s second half, add a hopeful percentage, and trust that the bank account will agree in November. Then a slow August, a late-paying customer, or a sales tax payment larger than expected breaks the plan. A realistic H2 2027 forecast, covering July through December, works differently. It starts from what actually happened in your first half, separates the money that belongs to you from the money you only hold for the state, and gives you three scenarios instead of one wishful number. Done well, it tells you when to hire, when to hold back inventory, and how much cash to keep aside for tax deadlines. This guide walks through the process in plain English, using a Florida business as the example, so you can build a forecast you will trust and update every month.
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Does an H2 forecast apply to your Florida business?
Yes. Any Florida business that sells taxable goods or services should forecast second-half revenue, because sales tax collected is not income. The Florida Department of Revenue expects collected tax to be reported and paid on schedule, so your forecast must separate real revenue from tax you are holding for the state.
Florida’s general rule is that services are not taxable unless listed in Statute 212, while tangible personal property is taxable unless specifically exempt. Check which side your sales fall on before you forecast, because it decides which part of each invoice belongs in revenue and which part belongs to the state.
Owners who pay estimated income tax through the year should also keep the IRS calendar next to the forecast. A strong December on paper means little if the fourth-quarter estimated payment arrives before the cash does.
How the rate works: keeping sales tax out of your forecast
Florida sales tax has a simple structure: a state rate plus a county surtax that varies by county. The same sale can carry a different total depending on where the product is delivered or the service is performed. Do not type one combined percentage into a spreadsheet and call it done. Confirm the current figure for each county you sell into on floridarevenue.com or in the calculator, and update it whenever it changes.
Then build every revenue line in two columns: sales before tax, and tax collected. Only the first column is revenue. The second column is a liability that moves through your account on its way to the state, and it should never inflate the growth story your forecast tells.
How to build the forecast step by step
Step 1: start with real numbers. Pull the last twelve months of actual sales, or the first half of 2027 if you are building this at midyear. Use sales before tax, month by month. If your records are messy, fix the categories first, because a forecast built on mislabeled transactions only repeats the mistakes.
Step 2: split recurring from one-time revenue. Monthly contracts and repeat customers are predictable. A one-off project or a seasonal rush is not. Forecast them on separate lines so one big job last summer does not quietly become the baseline for this summer.
Step 3: adjust for your calendar. Florida hurricane season runs through the end of November, school calendars shift demand, and many industries slow down around the holidays. Mark the months where your own history shows a dip or a surge, and adjust only those months.
Step 4: build three scenarios. Create a conservative, an expected, and an optimistic version. Set the range from your own history, such as your weakest and strongest comparable months, not from a generic growth target. Plan spending against the conservative case and treat the rest as upside.
Step 5: convert revenue into cash. An invoice sent in December may be paid in January. Forecast when money lands, not only when you earn it, and place your sales tax filing dates on the same calendar. A Florida DR-15 return is due by the 20th of the following month. The process on floridarevenue.com is straightforward: sign in to your account, select the filing period, report gross sales and taxable amounts including the county for each sale, review the totals the system calculates, submit payment, and save the confirmation.
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Common mistakes
Counting sales tax as revenue. When collected tax sits inside the revenue line, the forecast looks healthier than the business really is, and the shortfall shows up the month the return is due. Keep the two columns separate from the first entry.
Using one scenario. A single number feels clean, but it hides risk. If July comes in softer than expected, you have no plan for what to cut or delay. Three scenarios turn a bad month into a decision you already prepared for.
Setting it once and never revisiting it. A forecast is a working document. Each month, compare actual results to the forecast, note the gap, and adjust the remaining months. Small corrections made early are far easier than a large correction made in December.
Ignoring payment timing. Revenue earned is not cash received. Customers who pay in 30 or 45 days push money into the next period, which can make a good quarter feel tight. Forecast receipts separately so payroll and tax dates never catch you off guard.
Frequently Asked Questions
What is an H2 revenue forecast?
It is an estimate of your sales for the second half of the year, July through December. It is usually built from actual results, adjusted for seasonality, and expressed as a range instead of a single figure.
How far back should I look when building it?
Twelve months of actual sales gives you a full seasonal picture. If you are building the forecast at midyear, the first half of the year is the most relevant starting point. Use sales before tax in both cases.
Should the forecast include sales tax?
Track it, but keep it out of revenue. Sales tax collected belongs to the state, so it needs its own column and its own filing dates. Mixing it into revenue overstates how much money the business can spend.
How often should I update the forecast?
Monthly is a good habit. After each month closes, compare actual sales to the forecast, note the difference, and adjust the remaining months. A short monthly review keeps small misses from becoming large surprises.
Do I need a CPA to build one?
You can build the first version yourself with a spreadsheet. A CPA is valuable for reviewing assumptions, tax planning, and anything with legal or filing consequences. Clean, well-categorized transaction data makes that conversation faster and usually less expensive.
A realistic forecast is less about predicting the future and more about building one steady habit: compare your plan to your actual sales every month, and keep sales tax visible but separate. When your forecast, your sales figures, and your return all tell the same story, surprises get smaller and decisions get easier. Start with last year’s actual numbers, build three scenarios, mark your filing dates on the calendar, and review the plan at the end of each month. By December, you will know exactly where the second half stood.
This article is for general educational purposes and isn’t a substitute for advice from a licensed CPA or tax attorney. Rules vary by jurisdiction and change over time — always confirm current requirements with the Florida Department of Revenue or your advisor.
For business owners and CPAs comparing options, our guide on outsourcing back-office work walks through what to hand off first and what to keep in-house.