How to Build a Budget for Your Small Business
A lot of business budgeting advice treats budgeting like a discipline thing, where success is measured by how closely you stuck to the plan. That framing is useful for some people and counterproductive for others. For most of my clients, a budget is more useful as a planning tool than a behavioral one: a way to know what your business actually needs to take in to keep running, where the money is going, and what you can afford to do or change.
Here's a practical approach to building one.
Step 1: List your fixed expenses
Start with what your business spends every month no matter what. These are the recurring costs that stay roughly the same:
Rent or studio space (if you have it)
Software subscriptions (QuickBooks, scheduling, email, design tools, etc.)
Insurance (liability, business, professional)
Phone and internet (the business portion, if shared)
Loan or financing payments
Recurring professional memberships or association dues
Bookkeeping, accounting, or other professional services you pay for monthly
Add them up. This number is what your business has to bring in just to maintain the status quo, before you've paid yourself anything. For most small service businesses, this lands somewhere between $300 and $2,000 a month, depending on whether you have rent and how built-out your software stack is.
If you don't know your fixed expenses off the top of your head, your Profit & Loss statement for the past few months is the easiest place to find them. Look at categories that show roughly the same number every month.
Step 2: Estimate your variable expenses
These are costs that fluctuate but that you can predict in a general range:
Supplies (massage oils, retail inventory, office supplies)
Continuing education and professional development
Marketing (ads, email platform overage, design work)
Travel for work
Equipment repairs and replacement
Bank and payment processor fees (these scale with revenue)
Self-employment taxes (treat as a percentage of revenue, usually 25-30%)
Look at the past 6-12 months of your books and average each category. Use the average as your monthly budget for that line. If your books aren't current enough to do this, that's a sign your books need attention before the budget will be useful.
A note on taxes: this is the line that most people underbudget for. If you're self-employed and not having taxes withheld anywhere, you need to be setting aside a percentage of every dollar you bring in. Talk to your tax preparer about the right percentage for your situation, but treat it as a non-negotiable budget line, not as something you'll figure out at year-end.
Step 3: Pay yourself
Most budget advice for small businesses skips this step or tucks it into "discretionary spending," which is wrong. Your owner's pay is not discretionary. It's the whole point of running a business.
Decide what you need to take from the business each month, both to cover your personal expenses and to make the business worth running. Add it to the budget as its own line.
If your math says you can't actually pay yourself what you need to pay yourself, that's information your budget is doing its job by surfacing. The fix isn't usually "tighten up the budget further." It's usually "raise prices, increase volume, or reduce costs," and you need real numbers to figure out which.
Step 4: Build a buffer for the unexpected
Things break. Equipment fails, software auto-renews at a higher rate, a client cancels a package, your laptop dies. Budgeting like none of that will happen is how a tight budget becomes a stressful one.
A practical approach: add a small monthly buffer to your budget (somewhere between 5% and 15% of your typical expenses), and treat it as a category just like any other. If you don't use it in a given month, it accumulates. Over time, that builds into your business reserves.
This is different from the "3-6 months of expenses" rule you'll see in personal finance advice. For a business, the right reserve depends on your industry, how predictable your revenue is, and your own risk tolerance. A massage therapist with steady weekly clients might be fine with two months of expenses set aside. A coach whose income depends on enrollment cycles probably wants more. There's no universal number.
Step 5: Review every month, adjust every quarter
A budget you set once and don't look at again isn't really a budget. It's a wish list.
The monthly review is light: pull your actual P&L for the month, compare it to your budget, and see where you came in. If something's significantly over or under, ask why. Often it's a one-time thing (an annual subscription that hit this month) and not worth changing the budget for. Sometimes it's a real pattern (your software costs have crept up) and the budget needs updating.
The quarterly adjustment is where you make real changes. Look at the past three months together, see what's actually happening, and update the budget to match reality. A budget that doesn't match what your business is actually doing has stopped being useful.
If you're a self-care provider and want a worksheet-style version tailored to your industry — with commonly-missed budget categories and a step-by-step walkthrough — you can grab my Budgeting for Self-care Providers PDF.
On budgets and shame
Budgeting carries a lot of emotional weight for most of us, especially when money has felt scarce or stressful in the past. If you've tried to budget before and "failed," the issue is almost never about you and your discipline. It's almost always about the budget being unrealistic to start with, or not adjusted as your situation changed.
A useful budget is honest about your actual costs (including the ones you've been quietly paying without tracking), realistic about your income, and flexible enough to change as your business does. If yours doesn't currently meet those criteria, the fix is to rebuild it, not to feel bad about the old one.
The same principles apply to personal budgets
If you're also rebuilding your personal budget, the same five-step framework works: fixed expenses, variable expenses, savings/yourself, buffer, monthly review. The categories shift (mortgage instead of rent, groceries instead of supplies), but the structure is the same.
If you'd rather have someone help with the business side
If your books aren't currently in a state where you could build this budget without a headache, or if budgeting has been on your "I'll get to it" list for a while, book a free call. Getting your books into shape so you can actually budget against real numbers is part of what I do for clients.