Sole Trader Break-Even Calculator
See how many sales or jobs you need each month to cover your business costs—and what it takes to reach your income goal.
Calculate your break-even point
Enter average monthly figures. The sole trader break-even calculator shows the sales volume needed to cover fixed costs, the contribution from each sale and the result at your expected sales level.
Costs that remain broadly stable even when sales change.
The average amount charged for one product, service or job.
Costs directly created by each sale, such as materials or platform fees.
The number of sales or jobs you realistically expect.
A planning target before personal Income Tax and National Insurance.
This calculator is a planning estimate, not personalised tax or financial advice. It excludes VAT, Income Tax and National Insurance. Use figures that reflect your own business and review the result with a qualified adviser where needed.
The three figures that drive break-even
A reliable answer depends on separating costs correctly and using a realistic average selling price.
Fixed costs
Rent, software, insurance and regular professional fees usually continue whether you make one sale or one hundred.
Variable costs
Materials, packaging, card fees, marketplace commission and job-specific travel can rise with each sale.
Selling price
Use the average amount received before VAT. If prices vary widely, calculate separate services or product groups.
What does break-even mean?
Your break-even point is where sales revenue covers the costs included in the calculation. At that point, the business has neither made a profit nor a loss for the period.
For a service business, one “sale” might mean a booked appointment, client day or completed job. For a product business, it may mean one item or an average order. Choose a unit that matches how you normally plan capacity.
Break-even sales units = fixed costs ÷ (selling price − variable cost per sale)The amount left after the variable cost is the contribution per sale. It first pays towards fixed costs. Once fixed costs are covered, additional contribution becomes operating profit before tax and any costs not entered.
Why round sales up?
You usually cannot complete a fraction of a job or sell part of an appointment. The calculator therefore rounds the number of sales up. The revenue figure also shows the precise mathematical break-even point for comparison.
Classify your costs carefully
A cost is fixed when it does not change directly with each sale in the period. Examples may include bookkeeping software, core insurance, premises rent, website fees and regular subscriptions.
A variable cost is attached to delivering a particular sale. Depending on the business, examples may include stock, ingredients, packaging, payment charges, marketplace commission or a subcontractor used for each job.
Include a realistic owner-income target
Breaking even only covers the fixed costs entered. It may not provide enough money for you personally. The income-goal result shows the sales needed to cover fixed costs and generate your chosen monthly amount before personal tax.
Use the result to improve pricing
If the required sales volume is greater than your available time or customer demand, changing price may be more realistic than simply trying to work faster. Even a modest price increase can improve contribution when variable cost stays similar.
Test several scenarios
- Increase the selling price while keeping costs unchanged.
- Reduce waste or supplier costs per sale.
- Remove a fixed subscription that delivers little value.
- Compare a quiet month with a normal and strong month.
- Run separate calculations for your main services.
Scenario testing turns break-even from a static number into a decision tool. Save the assumptions behind each version so you can compare them later.
Watch capacity
A target of 80 jobs is only useful if you can deliver 80 jobs without harming quality. Compare sales needed with working days, billable hours, travel time and seasonal demand.
Track actual performance
Compare expected sales with actual results at least monthly. If contribution per sale falls, check discounts, materials, card fees and other direct costs. If fixed costs rise, update the calculator rather than relying on an old target.
VAT and break-even
If you are VAT registered, use figures consistently. For management planning, businesses normally compare net sales and net recoverable costs where appropriate. VAT treatment depends on your circumstances, so confirm the correct basis for your records.
Tax is different from break-even
Business profit may create Income Tax and National Insurance liabilities. The calculator does not estimate those amounts. Keep a separate tax reserve and use up-to-date figures when planning drawings.
Sole trader break-even FAQs
How do I calculate break-even as a sole trader?
Subtract the variable cost per sale from the selling price. This gives contribution per sale. Divide monthly fixed costs by that contribution to find the number of sales needed to break even.
Should my own drawings be included as a fixed cost?
Drawings are not a business expense in the accounts. For planning, enter your desired owner income separately so the calculator can show the sales needed beyond basic business break-even.
What if I sell several services at different prices?
Use a weighted average if the mix is stable, or run a separate calculation for each important service. Separate calculations often reveal which work makes the strongest contribution.
Does the calculation include VAT?
No. Use a consistent net or gross basis that suits your position. VAT-registered businesses should normally plan using figures that reflect how VAT is recorded and recovered.
Are Income Tax and National Insurance included?
No. Break-even measures business costs and contribution. Personal tax and National Insurance depend on your profits and circumstances and should be planned separately.
What is a good contribution margin?
There is no universal percentage. A business with low fixed costs may operate with a lower margin, while a time-limited service often needs a stronger margin. Compare with your capacity, risk and income target.
How often should I update the calculation?
Review it whenever your price or costs change and at least quarterly. Seasonal businesses may benefit from a separate calculation for busy and quiet periods.
Want clearer numbers behind your business?
Real Key Accountancy helps sole traders keep records organised and understand the figures behind pricing and cash flow. Book a free 15-minute bookkeeping check to discuss your records and the figures behind pricing and cash flow.