Know what you have
Start with the cash, savings, investment or funding genuinely available to the business.
Startup budget planner UK
Build a startup budget that shows where the money is going — and how long it needs to last.
Polar Startup Budget Planner helps you bring startup costs, monthly expenses, expected income and available funding together into one clearer financial plan. See what the business may need before launch, what it may spend each month and where pressure could appear.
Startup and monthly costs
Budget vs actual
Cash runway visibility
Inside Polar · Startup Budget Planner
Example
STARTUP BUDGET PLANNER
Your launch budget
See what the business has, what it expects to spend and how much breathing room remains.
CURRENT BUDGET PICTURE
Northway Services
£20,000
Cash available
£8,420
Startup costs
£2,180
Monthly costs
5.3 months
Indicative runway
Opening cash
£20,000
Startup setup costs
-£8,420
Month 1 planned spending
-£2,180
Month 1 expected income
+£1,200
Projected month-end cash
£10,600
Polar view:
the startup can launch on this example budget, but the early months
still need careful monitoring while sales build.
Business startup budget
Starting with enough money to open is one thing. Starting with enough money to keep going is another.
A startup budget brings the financial picture together before the business commits to spending. It helps you compare the money available with setup costs, ongoing expenses and the income you expect the business to generate.
Plan what will leave
Bring startup costs and regular monthly spending into one realistic budget instead of considering them separately.
See what remains
Understand how much room the business may have while expected income begins to develop.
How to create a startup budget
Build the budget from the business underneath it.
A useful startup budget is not simply a spreadsheet of hopeful numbers. It should reflect what your particular business needs to buy, what it costs to operate and how quickly income may realistically build.
Opening cash
Record the money that is actually available to fund the business.
Startup costs
Include the setup spending required before the business can begin trading.
Monthly fixed costs
Add expenses that stay relatively consistent each month.
Variable costs
Include costs that rise or fall depending on the amount of business activity.
Expected income
Add realistic expectations for sales and income as the business launches.
Contingency
Leave some room for costs or delays that did not appear in the original plan.
Fixed and variable costs
Know which costs stay put — and which move with the business.
Understanding the difference between fixed and variable costs makes a startup budget much more useful when sales begin to change.
Fixed costs
Costs that continue each month.
These may stay broadly similar even when the business has a quieter month.
- Rent and premises
- Software subscriptions
- Insurance
- Phone and internet
- Vehicle finance
- Accountancy support
- Regular wages
- Other monthly overheads
Variable costs
Costs that move with activity.
These may rise as the business sells more, takes on more work or uses more materials.
- Stock and materials
- Delivery
- Fuel
- Payment fees
- Sales commissions
- Job-specific labour
- Packaging
- Other activity-linked costs
Small business budget template
The three numbers a startup budget should never hide.
Templates often become long tables of figures. Polar keeps bringing you back to the questions that matter most to the founder.
Can this business afford the plan?
These three numbers provide a quick sense of whether the budget has enough breathing room or whether the plan needs another look.
Cash available
£20,000
The money currently available to launch and support the business.
Monthly spending
£2,180
The approximate regular cost of keeping the business operating.
Cash runway
5.3 months
An indication of how long current cash may last if income develops more slowly than planned.
Monthly business budget
See how the picture could change month by month.
A startup rarely moves from zero sales to full stability overnight. Mapping the early months can help expose periods where cash could become tight.
Launch
Early sales may still be developing while regular expenses have already started.
Expected cash: £10,600
Build
Marketing and sales activity begin feeding more customers into the business.
Expected cash: £9,950
Gain traction
Revenue begins moving closer towards the monthly cost base.
Expected cash: £9,620
Stabilise
The budget begins showing whether the original sales assumptions were realistic.
Expected cash: £9,780
Budget vs actual
The plan becomes more useful once real numbers start arriving.
After launch, compare what you expected to spend with what the business actually spent. Differences can reveal where assumptions were too optimistic or where the business is performing better than expected.
Your budget is a plan — not a promise.
New businesses learn quickly. Actual costs may be higher, income may arrive later, or some expenses may be lower than expected.
Polar principle:
update the plan when reality teaches you something useful instead of pretending the original figures were perfect.
update the plan when reality teaches you something useful instead of pretending the original figures were perfect.
Example budget review
Category
Budget
Actual
Variance
Marketing
£500
£440
£60 under
Fuel
£280
£345
£65 over
Software
£110
£110
On plan
Materials
£650
£725
£75 over
Cash runway calculator
How long could the startup keep going if sales take longer than expected?
Cash runway is a useful planning indicator. It compares available cash with the rate at which the business expects to use it. It is not a guarantee, but it can expose a financial pressure point early.
Cash after startup costs
Begin with the money remaining once initial setup spending has been paid.
Monthly cash need
Estimate the amount the business expects to use each month after allowing for incoming income.
Indicative runway
Compare those figures to understand roughly how long the current funding may support the plan.
Startup funding needs
Use the budget to work out whether there is a funding gap.
Once startup costs and expected monthly spending are visible, you can compare them with available cash and see whether the business may require more funding before launch.
How much do you actually need?
A funding requirement should ideally be built from the planned use of the money rather than an attractive round number.
- Startup setup costs
- Opening stock or materials
- Equipment
- Marketing
- Monthly operating costs
- Working capital
- Contingency
Example funding picture
The startup budget can help make a funding conversation clearer by showing where the expected money will be used.
Total cash requirement
£24,000
Founder funds
£14,000
Potential funding gap
£10,000
12 month business budget
Look beyond launch day.
A 12-month budget can help the founder think about how spending, sales, hiring, marketing and other business activity may develop over the first year.
Seasonal changes
Consider whether some months are likely to be stronger or weaker than others.
Planned investment
Add major purchases or expected investments before they arrive unexpectedly.
Hiring plans
See how taking on an employee could change the monthly cost base.
Marketing changes
Plan periods where increased marketing spending may be needed.
Revenue assumptions
Compare planned growth with the level of spending required to support it.
Contingency
Leave room for the first year to be less predictable than the spreadsheet.
Budget planner connected to your business
The startup budget is only one part of the financial picture.
Polar connects budgeting with the tools used to understand startup costs, funding, cash flow, break-even and the wider business plan.
Startup Cost Builder
→
Startup Budget Planner
→
Funding Centre
→
Cash-Flow Forecast
→
Break-Even Builder
→
Business Plan
Budget vs cash flow
A budget and a cash-flow forecast answer different questions.
Your budget sets out what you expect the business to earn and spend. Cash-flow forecasting focuses more closely on when the money is expected to arrive and when payments have to leave the bank.
Budget
What are we planning to earn and spend over the period?
Cash flow
When is the money actually expected to come in and go out?
Together
Use both views to understand whether the financial plan is realistic and fundable.
Startup financial plan
Spot the pressure before the bank balance does.
The point of budgeting is not predicting every pound perfectly. It is to expose assumptions, shortfalls and difficult months early enough to do something about them.
Costs higher than expected?
Revisit the budget before additional spending becomes normal.
Sales building slowly?
See how a delay in expected income changes the amount of financial breathing room.
Funding running tight?
Identify the gap while there is still time to reduce costs, change the plan or consider funding options.
Startup budget FAQs
Questions about creating a budget for a new business.
What is a startup budget?
A startup budget brings together the money available to start the business, initial setup costs, expected monthly expenses and expected income so the founder can understand the financial requirements of the plan.
How do I create a startup budget?
Start with available cash, then add one-off startup costs, fixed monthly costs, variable expenses, expected income and a contingency. Review the resulting cash position over the first months of trading.
What should a startup budget include?
A useful startup budget may include opening cash, setup costs, equipment, stock, premises, marketing, software, insurance, staff, monthly overheads, variable costs, expected income and contingency.
What is the difference between startup costs and a startup budget?
Startup costs identify what it may cost to get the business ready. A startup budget places those costs alongside available money, ongoing expenses and expected income to show the wider financial picture.
What are fixed and variable business costs?
Fixed costs tend to remain broadly similar each month, while variable costs change with activity or sales. Both should be considered when building a startup budget.
What does budget vs actual mean?
Budget vs actual compares what the business expected to spend or earn with what actually happened. The difference can help improve future planning.
What is cash runway?
Cash runway is an indication of how long available funds may support the business based on the rate at which cash is expected to be used.
Do I need a 12 month business budget?
A 12-month view can be useful for considering seasonality, planned investment, hiring, marketing and other changes during the first year. Funding providers may also request forward-looking financial information.
Is a startup budget the same as a cash-flow forecast?
No. A budget focuses on planned income and spending, while a cash-flow forecast focuses more closely on when money is expected to enter and leave the business.
Can Polar connect my startup budget with funding and cash flow?
Polar Startup Budget Planner sits within the wider Polar financial journey alongside Startup Cost Builder, Funding Centre, Cash-Flow Forecast, Break-Even Builder and Business Plan tools.
Polar Startup Budget Planner
Know what you can spend, what you need to keep back and how long the money may need to last.
Bring startup costs, monthly spending, expected income and available funding together, then use the budget to understand runway, funding needs and the financial pressure points ahead.