How to Create a Business Budget in 7 Steps

What is a business budget?

A business budget is a plan for how much money you expect to bring in and spend over a set period, usually one fiscal year broken out by month. It sets spending limits by category — rent, payroll, marketing, insurance — so you can tell whether you're on track, and gives you something concrete to compare your real results against.

It doesn't need to be complicated. If you've ever made a personal budget, you already understand the idea. A business budget just has a few extra categories and a few rules about what to leave out.

Before you start: what to gather

Five minutes of prep saves an hour of guessing.

• Last year's numbers, if you have them. Your accounting software can export a profit and loss statement by month.
• Your fixed expenses. Lease, insurance policies, loan payments, software subscriptions.
• Your payroll list. Everyone you pay, including yourself.
• A rough sales estimate for the year ahead.

If you're brand new and have none of this, you're not stuck. Step 2 covers where the numbers come from when you don't have history.

Step 1: Pick your time period and your categories

Most businesses budget for one fiscal year, broken down month by month. Monthly matters — an annual total tells you nothing about whether you can make payroll in March.

Then decide on your expense categories. The goal is enough detail to be useful, few enough that you'll keep it up. Most small businesses land somewhere between eight and fifteen.

A starting list that works for almost anyone:

Split a category when you want to watch it closely. If marketing is a big line for you, break it into advertising, trade shows, website, and print rather than lumping it together. If it's $200 a month, leave it alone.

One practical tip: make your categories match the ones in your accounting software. When you get to Step 7, comparing budget to actuals is trivial if the labels line up and can be painful if they don't.

Step 2: Estimate your revenue

Start with revenue, because several expenses will scale off it.

If you have history: start with last year's monthly figures and adjust for what you know is changing — a price increase, a new location, a customer you lost.

If you're new: build it from the bottom up rather than picking a number that sounds good. How many customers can you realistically serve in a month, and what does each one pay? A salon with three chairs, six clients a chair per day, at $60 a visit, six days a week is a revenue estimate based on real numbers. "$400,000 in year one" is a wish.

Be conservative here. An optimistic revenue number makes every expense decision downstream look more affordable than it is.

Step 3: Know what does not go in your expense budget

This is where most budgets go wrong, and it's worth getting right before you start filling in numbers. Three kinds of spending are real money leaving your account but don't belong in your expense budget.

Direct costs. What you spend to actually make your product or deliver your service — materials, ingredients, wholesale cost of goods you resell. These belong with your sales forecast, not your expenses, because they rise and fall with sales. A coffee shop's beans are a direct cost. Its rent is an expense.

Asset purchases. A vehicle, a major piece of equipment, inventory, leasehold improvements. You're buying something that holds value, so it shows up on your balance sheet and in your cash flow, not as an expense. Smaller items like laptops and phones can usually be expensed — check with your accountant or your local tax authority.

Loan principal. Here's the rule: the interest is an expense; the principal repayment is not. Interest goes in your budget. The principal comes off your loan balance and shows up in cash flow.

If you put these in your expense budget, you are putting them in the wrong place. Direct costs are part of your gross margin. Revenue minus direct cost gives you gross profit, and gross profit divided by revenue gives you your gross margin.

Related: What are direct costs? · What is a balance sheet?

Step 4: Fill in your fixed expenses

Fixed expenses are the ones that stay roughly the same whether you have a busy month or a slow one. Rent, insurance, subscriptions, professional retainers.

These are the easy ones — you're mostly copying numbers off contracts. Do these first and get the quick wins on the board.

If you're estimating from scratch: look up commercial listings for realistic rent in your area, get an actual quote from an insurance broker, check published pricing for the software you'll need. Half an hour of looking things up beats an hour of guessing.

Step 5: Estimate your variable expenses

Variable expenses move with your activity level. Marketing, shipping, travel, supplies, commissions.

Two ways to estimate them:

A flat monthly amount. Fine for anything steady. "$400 a month on supplies."

A percentage of sales. Better for anything that scales with volume. Online advertising is the classic case — budget 8% of revenue rather than a fixed dollar figure, and the number adjusts automatically as your sales estimate changes. Same logic works for shipping costs and sales commissions.

Percentage-of-sales is the more useful approach for anything genuinely tied to volume, because it means you only have to update one number when your revenue outlook changes.

Step 6: Calculate payroll separately, then add it in

Payroll is usually the biggest line in the budget, and it has costs attached that people forget. Build it on its own, then bring the total across.

List who you pay. Individual names if you have a handful of staff; groups like "kitchen," "sales," or "support" if you have more. Include planned hires with the month you expect them to start.

Pay yourself. Founders leave this out constantly and it makes the budget useless — the business looks profitable only because it isn't paying one of its workers.

Add the burden. Wages aren't the whole cost. Employer payroll taxes, health insurance, retirement contributions, and workers' comp add meaningfully on top. A rough estimate of 25% on top of gross wages gets you close enough to start. Refine it later with your actual rates.

So a $60,000 salary is roughly $75,000 in real budget terms. Multiply that across a team and the gap between "wages" and "payroll cost" gets large fast.

Step 7: Add it up, then compare it to reality every month

Total your revenue, subtract direct costs to get gross profit, subtract your expense budget, and you have projected profit. If that number is negative every month for a year, you've learned something important before spending any money — go back and adjust prices, costs, or plans.

Then comes the part that actually makes budgets worth doing.

Set a monthly review. A week or two after month end works well — your books have caught up but the month is still fresh. Pull actuals from your accounting software and put them next to your budget.

Ask three questions:

1. Where were we over, and where under?
2. Why?
3. Does the budget need changing, or does the spending?

Over budget isn't automatically bad. If you spent more on marketing and it produced more sales than planned, that's the system working. The right response is to raise the marketing budget, not cut it.

Watch the year, not just the month. Lots of businesses build an annual budget and divide by twelve. That's a reasonable shortcut, but real spending is lumpy — a trade show or an insurance renewal lands in one month. If you're over for a month but on track for the year, you're fine. Check the annual figure before reacting.

And check cash, not just budget. Your budget tells you whether spending is on plan. It doesn't tell you whether you can afford to spend it right now. If you need to spend most of your annual marketing budget in two months, that's a cash flow question, and your budget alone won't answer it.

Budget or forecast — do you need both?

Short version: a budget sets spending limits for a fixed period. A financial forecast projects where the whole business is heading and gets updated as things change.

They're not competing. Most small businesses do best building the forecast first — it gives you the full picture including cash — and then setting budgets within it. The budget is how you manage spending; the forecast is how you steer.

If you only have time for one, start with the forecast.

Full comparison: Budget vs. Forecast: Differences Explained

Four mistakes that make budgets useless

1. Too many categories. Forty line items feels thorough and guarantees you'll stop updating it by March.
2. Building it once and filing it. An unreviewed budget is a document, not a tool.
3. Leaving out owner pay. It hides the real cost of running the business.
4. Categories that don't match your accounting software. You'll spend the monthly review reconciling labels instead of making decisions.

Get your budget built: a budget isn't a test you pass or fail. It's a set of educated guesses that get better every month you check them against reality. Start with the categories above, put your best numbers against them, and book a recurring monthly hour to compare plan against actual. Build your business budget in LivePlan →