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You’ve been meaning to do it for a while. Maybe a lender asked for one. Maybe you just have a nagging feeling that you should have a budget, and every time you open a blank spreadsheet, you quietly close it again.
If that sounds familiar, you’re in good company. Most small business owners we work with have never built a formal budget. Not because they’re disorganized, but because nobody ever showed them how, and the word “budget” sounds far more complicated than it is.
Here’s the good news: a budget is simply a plan for your money. It’s your best guess at what’s coming in and what’s going out, written down so you can make decisions on purpose instead of by feel. This guide walks you through the exact steps. No accounting degree required.
A budget isn’t a test you can fail, and it isn’t a set of rules that locks you in. Think of it as a map. You sketch out the route you expect to take, then check in along the way to see where you actually went.
Your first budget will be wrong. Every budget is, at least a little. That’s not a problem; that’s the point. The gap between what you planned and what really happened is where you learn the most about your business.
1. Gather Your Last 12 Months of Numbers
Before you look forward, look back. Pull your Profit & Loss report (the report that shows the money you earned and the money you spent) for the past 12 months. If you use QuickBooks Online, it lives under Reports. If you’re not sure where to find it, our QuickBooks Online training can walk you through it step by step.
Books not fully up to date? That’s okay. Bank and credit card statements will get you surprisingly far.
Brand-new business with no history yet? Use vendor quotes, industry research, and honest estimates. The SBA’s guide to managing your finances is a helpful place to start.
2. Estimate Your Income Conservatively
Look at what you brought in last year, month by month, and notice the patterns. Do you have a busy season? A slow summer? A spike around the holidays?
Now estimate next year, and lean a little cautious. If you made $300,000 last year and feel good about growth, budget for $315,000, not $400,000. It’s much easier to adjust upward when good news arrives than to scramble when an optimistic number doesn’t show up.
Tip: product-based businesses can think in units sold; service-based businesses can think in clients or billable hours.
3. List Your Fixed Costs
Fixed costs are the bills that stay roughly the same every month, whether business is booming or slow. Rent, insurance, software subscriptions, loan payments, and salaried payroll usually land here.
These are the easiest numbers to budget because they’re predictable. Write each one down with its monthly amount. Don’t forget annual expenses like insurance premiums or license renewals. Divide those by 12 and include them monthly so they never catch you off guard.
4. Estimate Your Variable Costs
Variable costs move up and down with your sales. Materials, inventory, shipping, credit card processing fees, and contractor costs are common examples.
The simplest way to budget these is as a percentage of sales. If materials typically run about 30% of your revenue, apply that percentage to each month’s income estimate. When sales go up, so does your materials budget, just like real life.
5. Plan for Taxes, Savings, and Yourself
This is the step most first-time budgets skip, and it’s the one that causes the most stress later.
Set money aside for taxes throughout the year instead of waiting for one big surprise bill. The IRS explains how estimated tax payments work for business owners. Build in a cash reserve, even a small one. And decide what you’ll pay yourself. Your pay belongs in the budget, not in whatever happens to be left over.
6. Put It All Together and Check the Bottom Line
Subtract your fixed costs, variable costs, and planned set-asides from your expected income. What’s left is your budgeted profit.
If that number comes out negative or uncomfortably thin, don’t panic. That’s valuable information. It’s far better to learn now that your pricing needs adjusting or an expense needs trimming than to discover it in December.
A budget only works if you actually look at it. These habits help it stick:
Compare budget to actual every month – Check where you landed over or under your plan. Our Reporting & Analytics services help you read what those numbers are really telling you.
Look for patterns, not perfection – One month over budget isn’t a crisis. Three months in a row is a signal worth exploring.
Adjust quarterly – Your business changes, and your budget should too. Revisit your assumptions every few months.
Keep good records – Your budget is only as accurate as the books behind it. IRS Publication 583 is a great plain-language primer on what to track.
Don’t do it alone – Budgets are easier to build, and easier to stick to, when you have someo
Not very. Start with broad categories: income, fixed costs, variable costs, taxes, and owner pay. You can add more detail once you’re comfortable. A simple budget you actually use beats a detailed one you avoid.
Nothing bad, Going over isn’t failure; it’s feedback. Look at why it happened. Was it a one-time expense, a vendor price increase, or a sign your estimate was too low? Then adjust and keep going.
Yes, QuickBooks Online Plus and Advanced include a budgeting tool that compares your plan to your actual results automatically, so you don’t have to do the math by hand.
A good rhythm is to review it monthly, adjust it quarterly, and rebuild it once a year. That keeps it useful without making it a full-time job.
Building your first budget is really just a series of small steps: look back, estimate forward, plan for the expected and unexpected, and check in regularly. The first one is always the hardest.
And remember, there are no silly questions here. If you’re not sure where a number belongs or what a report is telling you, that’s exactly the kind of thing we love to work through together. Our Budgets & Cash Flow Advisory team is here to help you build a budget that fits your business, and one you’ll actually use.
Schedule your free initial consultation – let’s build your first budget together.
