How to Set a Budget for Your Small Business (And Actually Stick to It)
Updated: Oct 24
Running a small business means making financial decisions regularly. How much can you afford to spend? Is your revenue enough to cover your expenses? Are you setting aside enough for upcoming obligations?
Without a budget, it can be difficult to answer these questions with confidence.
A business budget helps you plan how much you expect to earn and spend over a period. It gives you a reference point for evaluating actual results, identifying changes, and making more informed decisions.
And it doesn't need to be complicated to be useful.
Why Does Your Small Business Need a Budget?
A budget is more than a list of expenses. It's a financial plan that helps you understand what your business needs to operate and what results you expect to achieve.
A practical budget can help you:
Estimate how much revenue your business needs to generate
Plan for regular operating expenses
Identify areas where spending may need attention
Compare actual results against expectations
Prepare for changes in business activity
Make decisions using financial information rather than assumptions
A budget won't eliminate uncertainty or guarantee profitability. But it can help you recognize when actual performance differs from your expectations.
Step 1: Start With Your Actual Numbers
Before creating a budget, review your business's financial results.
Your Profit & Loss Statement is a useful starting point because it shows revenue, expenses, and profit or loss over a specific period.
Ideally, review the past 6 to 12 months of financial information, if available.
Look for patterns such as:
Average monthly revenue
Seasonal changes in sales
Recurring operating expenses
Significant or unusual expenses
Changes in profitability
Months when expenses were higher than expected
If your bookkeeping is incomplete or inaccurate, address those issues before relying heavily on the numbers for planning.
A realistic budget starts with reliable financial information.
Step 2: Understand Your Business Expenses
Business expenses generally fall into two broad categories.
Fixed expenses
These are costs that remain relatively consistent over a period, even when sales activity changes.
Examples may include:
Office or commercial rent
Software subscriptions
Business insurance
Certain administrative salaries
Professional service retainers
Fixed doesn't necessarily mean an amount will never change. It means the cost doesn't usually vary directly with each sale.
Variable expenses
These costs change with business activity or sales volume.
Examples may include:
Materials used to produce goods
Product costs
Shipping and packaging
Sales commissions
Certain subcontractor costs
Some costs contain both fixed and variable components, so the classification may depend on how your business operates.
Don't confuse expenses with cash payments
Not every payment leaving your bank account is an expense on your Profit & Loss Statement.
For example, a loan payment may include both principal and interest.
The interest is generally recorded as an expense, while the principal reduces the outstanding loan balance on your Balance Sheet.
Both portions affect cash, but they are treated differently in your financial statements.
This distinction becomes important when you prepare both a budget and a cash flow forecast.
Step 3: Estimate Your Revenue
Your revenue budget should reflect what your business can reasonably expect to earn.
Start with historical results, then consider factors that may affect future sales, such as:
Existing customer relationships and recurring contracts
Seasonal demand
Pricing changes
Business capacity
Expected projects or orders
Changes in the market or operating environment
For a newer business without much historical information, you may need to rely more heavily on expected customer activity, pricing, and realistic sales assumptions.
Avoid building your entire budget around an optimistic revenue target without considering whether the business has the capacity and demand to achieve it.
You can also prepare different scenarios, such as a conservative estimate and a more optimistic one, to understand how changes in revenue could affect your results.
Step 4: Calculate Your Expected Profit
Once you've estimated revenue and expenses, you can calculate your expected operating results.
A simplified example:
Monthly budget | Amount |
Revenue | $20,000 |
Direct costs | ($8,000) |
Gross profit | $12,000 |
Operating expenses | ($9,000) |
Operating profit | $3,000 |
This example assumes no other income or expenses, income taxes, or additional adjustments.
It provides a starting point for understanding whether expected revenue is sufficient to cover the costs included in your budget.
Understanding break-even
Break-even is the point where revenue covers the costs included in your calculation, resulting in neither a profit nor a loss.
For a business with fixed and variable costs, a simplified break-even revenue calculation is:
Break-even revenue = Fixed costs ÷ Contribution margin ratio
The contribution margin ratio represents the percentage of sales remaining after variable costs.
For example, if monthly fixed costs are $6,000 and variable costs represent 40% of revenue, the contribution margin ratio is 60%.
$6,000 ÷ 60% = $10,000
Under those assumptions, the business would need approximately $10,000 in monthly revenue to break even.
Actual break-even calculations can be more complex, particularly for businesses offering multiple products or services.
Step 5: Remember That Profit and Cash Flow Are Different
A business can report a profit and still experience cash shortages.
For example, you may record revenue when an invoice is issued, but the customer might not pay until several weeks later.
Meanwhile, payroll, suppliers, taxes, and loan repayments may still need to be paid.
That's why a budget and a cash flow forecast serve different purposes.
A budget estimates revenue and expenses over a period and helps you evaluate expected profitability.
A cash flow forecast estimates when money is expected to enter and leave your business, helping you anticipate upcoming cash requirements.
Both can be useful, but they answer different questions.
Step 6: Build a Monthly Budget
An annual budget provides an overall financial plan, but breaking it down by month makes it easier to monitor.
A monthly budget should include:
Expected revenue
Direct costs, where applicable
Operating expenses
Expected profit or loss
You can also maintain a separate cash flow forecast for anticipated customer payments, supplier payments, payroll, taxes, financing repayments, and other cash commitments.
For businesses with seasonal activity, avoid dividing annual revenue evenly across 12 months unless that reflects how the business actually operates.
Use realistic monthly expectations based on your business's patterns.
You don't necessarily need complicated software to begin. A spreadsheet can be sufficient for a straightforward budget, provided the information is accurate and regularly reviewed.
Step 7: Compare Your Budget to Actual Results
Creating a budget is only the beginning.
Once you have actual financial results, compare them with the amounts you planned.
For example:
Category | Budget | Actual | Difference |
Revenue | $20,000 | $18,500 | ($1,500) |
Direct costs | $8,000 | $7,800 | ($200) |
Operating expenses | $9,000 | $9,400 | $400 |
Operating profit | $3,000 | $1,300 | ($1,700) |
In this example, revenue was lower than expected and operating expenses were higher.
Rather than focusing only on the $1,700 difference in operating profit, investigate what caused it.
Was revenue lower because of fewer sales, delayed projects, or changes in pricing?
Did operating expenses increase because of a one-time purchase or an ongoing cost?
Understanding the reasons behind significant differences helps you determine whether your assumptions or plans need to change.
Step 8: Review and Adjust Your Budget
A budget shouldn't be treated as a document you create once and never revisit.
Your business may experience changes in customer demand, operating costs, staffing, or other circumstances.
Reviewing your budget regularly allows you to identify those changes and consider their impact.
A practical monthly review might include:
Confirm that the bookkeeping records are accurate and reasonably complete.
Compare actual revenue and expenses with the budget.
Investigate significant differences.
Review upcoming cash commitments separately.
Update your expectations when circumstances change.
Keep the original budget available as a reference when making revisions. This allows you to understand how actual performance compares with your initial plan.
Common Budgeting Mistakes to Avoid
Using unrealistic revenue expectations
A budget based entirely on best-case sales assumptions may not provide a useful picture of expected performance.
Use reasonable assumptions and consider alternative scenarios where appropriate.
Forgetting irregular expenses
Some expenses occur annually, quarterly, or only occasionally.
Examples include insurance renewals, professional fees, equipment repairs, and certain software subscriptions.
Review prior-year records to identify costs that may not appear every month.
Treating every cash payment as an expense
Loan principal repayments, certain asset purchases, and other balance sheet transactions affect cash without necessarily being expenses in the same period.
Keep these distinctions in mind when preparing your financial budget and cash flow forecast.
Creating a budget but never reviewing it
A budget becomes more useful when you compare it with actual results.
Regular reviews help you identify changes, investigate differences, and improve future estimates.
Relying on inaccurate bookkeeping
If transactions are missing, incorrectly categorized, or unreconciled, the financial reports used to prepare your budget may not be reliable.
Accurate bookkeeping provides a stronger foundation for planning.
Final Thoughts
A useful business budget doesn't need to be complicated.
Start with accurate financial information, make realistic assumptions, and build a plan that reflects how your business operates.
Then review your actual results regularly and adjust your expectations when necessary.
Budgeting is not about predicting the future perfectly. It's about understanding your business's financial expectations and having a reference point for making informed decisions.
At Golden Star Bookkeeping, our focus is on helping growing incorporated businesses in BC maintain accurate financial records and understand the information behind their numbers.
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