How to Build a Small Business Budget in Year One

Most budgeting advice assumes you already have books. Pull last year’s numbers, adjust for growth, done. That advice is useless in year one, when the only honest answer to “what will you make next month” is that you have no idea.

So build the budget from the side you can actually know.

Why is a first-year budget different from a normal one?

A normal business budget starts with revenue. You take last year’s sales, adjust up or down, then plan spending against that number. In year one you have no last year, so every revenue figure in your budget is a guess dressed up as a plan.

That matters more than it sounds. If you budget $12,000 a month in sales and commit to $9,000 in expenses, you have not built a budget. You have built a bet. When sales come in at $6,000, the expenses do not adjust themselves.

The failure math is real but softer than the folklore. About 34.7% of establishments born in 2013 were still operating ten years later, according to the Bureau of Labor Statistics. Worth knowing: BLS counts a business as not surviving when it stops reporting employment, which sweeps in owners who retired, sold, or merged. The number overstates outright failure.

How do you build a budget with no revenue history?

Flip the order. Start with costs, which you can research, and treat revenue as the thing you solve for later.

Three buckets, in this sequence. First, what it costs to open the doors, meaning the one-time spending before you serve a single customer. Second, what it costs to keep the doors open for a month with zero sales, which is your fixed monthly burn. Third, how many months of that burn you can survive on the cash you have.

That third number is the one that decides whether you make it to the point where revenue matters. Only then do you work out what you need to sell.

The advantage of this order is that all three inputs are researchable. Rent has a price. Insurance has a quote. Your first month’s sales do not have a price, they have a hope.

Run your opening costs through the Startup Cost Calculator and keep that total somewhere you can see it.

What goes into a first-year business budget?

Six categories cover almost every small operation. One-time setup, which is registration, permits, equipment, deposits, and initial inventory. Fixed monthly, meaning rent, insurance, software, phone, and any salary you commit to. Variable, which moves with sales: materials, packaging, card processing fees, delivery. Debt service, if you borrowed. Taxes, which are not optional and are not a surprise. And a contingency line.

I want to be straight about something here. There is no reliable public data on how a typical first-year budget splits across those categories. Every article that shows you a pie chart with “payroll 30%, rent 15%” made it up or copied it from someone who did. So use the categories as a checklist, not as targets.

If you want those categories filled in with real figures, the breakdowns in our food truck guide and commercial cleaning guide sit at opposite ends of the range, roughly $85,000 to open one and $5,000 to open the other.

The one I see underestimated most is variable cost. At Craftan I costed our pottery packaging off a supplier’s per-unit price and forgot that fragile items need double boxing, filler, and a higher shipping tier. The real number was close to twice my estimate.

How much cash cushion do you actually need?

The most-cited measurement of small business cash reserves is a decade old. The JPMorgan Chase Institute looked at 470 million transactions across 597,000 small businesses in 2015 and found the median business held 27 cash buffer days, meaning it could cover 27 days of outflows if every dollar of income stopped. The median daily outflow was $374. The median balance was $12,100.

It splits by industry. Restaurants and retail sat at 19 days. Professional and high-tech services sat at 31.

Nobody has repeated that study since, which tells you something about how little attention the question gets. My view: 27 days is a description of the median, not a target. Treat it as the floor you are trying to clear, and budget toward 60 to 90 days of fixed costs before you spend on anything optional.

Take your fixed monthly number, divide by 30, and divide your cash by that. That is your buffer in days.

How do you set a revenue target you cannot measure yet?

Stop projecting and start solving. You know your fixed monthly costs and you know your margin per sale, near enough. Those two numbers give you the sales figure where you stop losing money, which is a target you can test against reality instead of a forecast you have to defend.

Work it out in the Break-Even Calculator, then ask the only question that matters: can you realistically sell that much in your market, in your first year, given how many hours you have?

If the answer is no, the budget is telling you to change something now, while changing it is cheap. Cut fixed costs, raise prices, or pick a different business. That is a far better outcome than finding out in month seven.

The wider conditions are not generous right now. In the Federal Reserve’s 2025 Small Business Credit Survey, published in March 2026, firms were more likely to report revenue falling than rising for the second year running.

What happens when the budget breaks in month three?

It will break. The question is what you do when it does, and the honest answer for most owners is that they borrow.

The Federal Reserve found that 60% of small employer firms applied for financing in the year before its 2025 survey. The most common reason was to meet operating expenses, at 56%, ahead of expansion at 46%. More small businesses borrow to cover the gap than to grow. Of those that applied, 42% got the full amount they asked for and 22% got nothing.

A note on that source. The Fed’s survey is a convenience sample rather than a random one, which the Fed states plainly in the report. It is the best available read on small business credit conditions, but treat it as a strong signal rather than a census.

Where you borrow changes the price. Among firms that borrowed from online lenders, 60% said the actual cost came in higher than they expected. At small banks that figure was 37%, and small bank applicants were also approved in full most often, at 57%.

So arrange credit before you need it. Price any offer properly in the SBA Loan Calculator before you sign, and do not take the first approval just because it came first.

Which numbers should you track every month?

Four, and it should take you twenty minutes.

Cash buffer days first, because it is the single number that predicts whether you survive the next bad month. Cash on hand divided by average daily outflow. Watch the direction more than the value.

Then actual against budget, by category, so you learn which of your estimates were wrong and by how much. After three months you stop guessing and start forecasting from your own history, which is the whole point of the exercise.

Third, gross margin per sale, which you can sanity check against your industry in the Profit Margin Calculator.

Fourth, money owed to you and how old it is. Getting paid late is the most common way a profitable business runs out of cash.

Skip the rest until you have staff. A first-year owner tracking fourteen KPIs is avoiding the four that matter.

FAQ

Sources

• JPMorgan Chase Institute, “Cash is King: Flows, Balances, and Buffer Days,” 2016. https://www.jpmorganchase.com/institute/all-topics/business-growth-and-entrepreneurship/report-cash-flows-balances-and-buffer-days
• Federal Reserve Banks, “2026 Report on Employer Firms: Findings from the 2025 Small Business Credit Survey,” March 2026. https://www.fedsmallbusiness.org/reports/survey/2026/2026-report-on-employer-firms
• US Bureau of Labor Statistics, Business Employment Dynamics, establishment age and survival data. https://www.bls.gov/bdm/

This is a guide, not tax or legal advice. Registration, permit, and tax rules vary by state, so check with your state agency or an accountant before committing to anything on the tax side.