Small business budget: how to build and track yours

Published Friday 27 February 2026

Table of contents

• Small business budgets are easier to make than you think
• The numbers that matter when setting a budget
• Creating your first small business budget
• How to manage and monitor your small business budget
• Testing different scenarios: what if?
• Using accounting software for budgeting
• Don't be afraid to ask for help
• Budgets put you in control
• FAQs on creating a small business budget

Key takeaways

• Gather accurate financial data from your profit and loss report and balance sheet rather than guessing at figures, as real numbers from your accounts will reveal how many sales you need to cover costs and when you can afford to hire help.
• Review your budget monthly at minimum with weekly cash flow check-ins, and update it whenever significant changes occur like gaining or losing a major client to keep your financial planning relevant.
• Use scenario planning to test different situations before they happen, such as modelling a 10% revenue increase or the impact of losing your biggest client, so you can make informed decisions about business growth.
• Consider using accounting software instead of spreadsheets to automate data collection, reduce errors, and track your budget performance in real time through visual dashboards and reports.

Small business budgets are easier to make than you think

Budgeting sounds complicated, but it doesn't have to be. Learn more about budgeting and forecasting. There are just three broad sets of figures to understand, and they're straightforward.

Setting a budget is part of becoming financially literate. The better you can read your business figures, the more successful you'll be. You don't need to become an accountant to do it.

The numbers that matter when setting a budget

Three key financial reports tell the story of your business finances: your profit and loss report, your balance sheet, and your cash position. You don't need to consider everything, just these core figures.

Profit and loss report

A profit and loss report shows whether you're making money or losing it by subtracting your expenses from your income. To help you get started, download our free P&L template.

Income (revenue)

Your income is the money you generate from sales. Break it into two categories:

• Recurring income: regular, reliable revenue from client retainers and contract work
• Expected income: a forecast of what your business is likely to earn

Expenses (costs)

Your expenses are the money going out to run your business. Break them into two categories:

• Recurring expenditure: monthly payments for rent, utilities, payroll and similar costs
• Sundry costs: occasional payments for office supplies, client entertainment and other items

Common costs that are easy to overlook:

• Depreciation: Business assets like computers and equipment lose value over time and should be counted as a cost
• Overheads: Fixed costs such as rent, electricity, gas and transport fuel
• Payroll: The total cost of employing staff, including insurance, taxes and benefits
• Debt repayments: Regular outgoings to repay loans or other business investments

Profit means more revenue coming in than costs going out. Loss means the opposite. A loss is acceptable in certain situations, but losses aren't sustainable over the long term.

If you make a profit, consider how to use it:

• Reinvest in the business: drive bigger profits through growth spending
• Pay down debts faster: reduce interest costs and improve cash flow
• Build cash reserves: create a buffer to ride out future revenue dips, especially important for seasonal businesses

A financial advisor can help you choose the most tax-efficient approach.

Balance sheet

A balance sheet shows what your business is worth by calculating the difference between what you own and what you owe.

Assets (what you own):

• Business property: work tools, equipment, real estate
• Cash: money in the bank
• Accounts receivable: invoices sent to clients but not yet paid

Liabilities (what you owe):

• Accounts payable: bills from suppliers not yet paid
• Tax obligations: taxes due in the near future
• Debt: loans or other business borrowings

Your balance sheet shows assets minus liabilities. Get started with our free balance sheet template.

With your profit and loss and balance sheet information at your fingertips, you're ready to start setting a budget. For more detail on financial statements, visit the financial statement glossary.

Creating your first small business budget

Now that you have your financial information in hand, you can create a forward-looking budget. A budget tells you how much you spend running the business, how much you can invest in growth, and how much you can pay yourself.

Here's how to build your first small business budget:

1. Gather your financial data: pull together your profit and loss report and balance sheet figures
2. Calculate your total revenue: add up all income sources, including recurring and expected revenue
3. List all your expenses: include recurring costs, sundry expenses, depreciation and debt repayments
4. Determine your profit or loss: subtract total expenses from total revenue
5. Plan your cash allocation: decide how to use any profit—reinvest, pay down debt, or build reserves

Your budget will also show you what your cash flow looks like, helping you avoid running out of money and getting into difficulty with creditors.

How to manage and monitor your small business budget

Budget monitoring means comparing your actual income and expenses against your budgeted figures on a regular basis. This helps you spot problems early and make adjustments before small issues become big ones.

Here's how to stay on top of your budget:

1. Set a review schedule: check your budget weekly for cash flow, monthly for overall performance
2. Compare actual vs budgeted figures: look at where you're over or under your predictions
3. Investigate variances: if actual numbers differ significantly from your budget, find out why
4. Adjust as needed: update your budget when circumstances change, such as a new client or unexpected cost
5. Use dashboards and reports: accounting software can show your budget performance at a glance

The goal isn't to stick rigidly to your original numbers. It's to use your budget as a tool for making better decisions as your business evolves.

Testing different scenarios: what if?

Scenario planning lets you test how changes affect your budget before they happen. Once you have a basic budget, you can model different situations:

• Revenue increase: See what happens if sales go up by 10 percent
• Client loss: Understand the impact of losing your biggest client
• Cost reduction: Calculate the benefit of negotiating lower rent

Many businesses use scenario planning to find out when they can afford to hire employees. Add payroll to your costs and see how it affects your profit.

Create several versions of your budget to cover different possibilities. Experiment as much as you like and see what the outcomes look like.

Using accounting software for budgeting

Accounting software makes budgeting faster and more accurate. When set up correctly, it automatically records all your income and expenditure, so you don't have to manually gather information.

Smart software also shows your income and expenditure in graphs and charts. This makes it much easier to spot trends and see how your business is performing.

Accounting software saves time compared to sifting through financial records manually, and keeps your numbers accurate instead of relying on estimates.

Don't be afraid to ask for help

You don't need an expert to set a budget, but one can help. It may be more accessible than you think. Some professional bodies offer programs that provide a consultation at no charge with a chartered accountant.

A bookkeeper or accountant can double-check your numbers and help you make realistic predictions about business growth, upcoming expenses and tax exposure.

They can also advise you on what to do if actual numbers differ from your predictions.

Bookkeepers and accountants charge for their time. But when it comes to budgeting, they often save you far more than they cost. If in doubt, ask one for help.

Budgets put you in control

A budget helps you make strategic business decisions. Not sure what's going to happen over the next six months? Test different scenarios and see what numbers emerge.

Having a budget also means you're ready to seek finance. If you need a loan, you have everything prepared to apply right away.

Most of all, a budget gives you certainty and confidence. You get a clearer picture of your business and know where you stand. It's like turning on a light in a dark room. You can see the obstacles and find your way around them.

Remember that a budget isn't set in stone. As your situation changes, you can adjust your figures and see what it means for your profit.

With Xero accounting software, you can track your budget in real time and make informed decisions faster. Get one month free to see how Xero simplifies budgeting for your business.

FAQs on creating a small business budget

Setting a budget can raise questions.

How often should I review and update my small business budget?

Review your budget monthly at minimum, with weekly check-ins on cash flow. Update your budget whenever significant changes occur, such as gaining or losing a major client.

What's the difference between a budget and a cash flow forecast?

A budget plans your expected income and expenses over a set period. A cash flow forecast predicts when money will actually arrive and leave your account, helping you avoid shortfalls.

Can I create a budget using spreadsheets or do I need accounting software?

You can create a budget with spreadsheets, but accounting software automates data collection and reduces errors. Software also makes it easier to track your budget against actual performance.

What should I do if my actual numbers differ significantly from my budget?

Investigate the cause of the variance first. Then decide whether to adjust your spending, revise your revenue expectations, or update your budget to reflect the new reality.

How far ahead should I budget for my small business?

Most small businesses budget 12 months ahead and review monthly. Some also create a high-level three-year budget for strategic planning. For some formal business plans, financial forecasts can be required up to five years ahead.