How to Estimate Startup Costs for a Small Business
To estimate startup costs, add four things: the one-time costs of setting up, the running costs you pay before your first sale, a cash buffer to cover the months until sales pay the bills, and a contingency for surprises. Get real quotes for the biggest lines, and plan for the buffer. It is the part most first budgets leave out.
Startup costs = one-time costs + pre-opening costs + cash buffer to break-even + contingency
Key takeaways
- One-time costs are only part of the bill. The cash you need to survive until break-even is often as large.
- Price the biggest lines with real quotes or listings, not guesses.
- Add a 10–20% contingency, then check your plan against a forecast.
What are startup costs?
Startup costs are the money you spend to get a business ready to sell and to keep it running until it pays for itself. They fall into two groups:
- One-time costs, such as registration, equipment, fit-out and opening stock.
- Ongoing costs you pay before revenue covers them, such as rent, software and marketing.
Lenders and investors look at both, because a business that can open but can’t reach break-even still fails.
Before you estimate: three questions to answer first
- How much of your own money can you risk, and for how long? This sets the size of the plan and whether you need outside funding.
- Which skills will you pay for? If you can’t do the bookkeeping, design or sales yourself, those become costs.
- Who will check your numbers? An accountant, a mentor or someone who runs a similar business will spot missing costs faster than you will.
If you’re still choosing what to start, see how to generate business ideas and how to validate a business idea.
How to estimate startup costs in 5 steps
Step 1: List your one-time costs
Write down everything you pay once before opening: registration and licences, website or shop fit-out, equipment, opening stock, branding and deposits. For each line, note where the number comes from: a supplier quote, a listing or an official fee page. Lines without a source are the ones that blow up later.
| Category | Examples | Where to get a real number |
|---|---|---|
| Registration and licences | Company registration, permits, trade licence | The official fee page or a registration agent’s quote |
| Premises and fit-out | Deposit, renovation, signage | Landlord and contractor quotes |
| Equipment and technology | Computers, machines, software setup | Supplier quotes, online prices |
| Opening stock | First order of goods or materials | Supplier price list × first order quantity |
| Branding and launch | Logo, website, launch campaign | Freelancer or agency quotes |
Step 2: Add the costs you pay before the first sale
Rent, software, insurance and salaries often start before the first sale, during fit-out, hiring or stock delivery. Multiply your monthly fixed costs by the number of months between signing up for them and opening.
Step 3: Add a cash buffer until break-even
Most businesses lose money for a few months after opening. A simple, cautious rule is to hold enough cash to cover your monthly fixed costs for the months you expect it to take to reach break-even. Use our break-even guide to estimate when that is, and cash runway to check how long your cash will last.
Step 4: Add a contingency
Add 10–20% of the total for things you didn’t plan, such as a price rise, a delayed licence or a broken machine. Use the higher end if you’re renovating premises or importing stock.
Step 5: Decide how you will fund it
Compare the total with what you can put in yourself. The gap is what you need from a loan, an investor or a partner, and they will ask to see the estimate and the forecast behind it. See how to fund your business.
Worked example: startup costs for a small online store
An online store plans to sell home products, run by the founder from a small storage unit. One-time costs come to $5,800: registration $300, website and product photos $800, equipment $700, opening stock $3,000, branding and launch $600, and a storage deposit $400. Monthly fixed costs are $660: storage $200, software $60, marketing $300, accounting and other $100.
| Line | Amount |
|---|---|
| One-time costs | $5,800 |
| Costs before the first sale (1 month of fixed costs) | $660 |
| Cash buffer until break-even (4 months of fixed costs) | $2,640 |
| Subtotal | $9,100 |
| Contingency (10%) | $910 |
| Startup budget | $10,010 |
The opening stock and the cash buffer make up more than half of the budget. Founders who plan only for the website and the first order usually run short in month two or three.
Illustrative figures, not a quote. Your costs depend on your market, products and suppliers.
Startup cost calculator
Enter your own numbers to get a startup budget, then turn it into a forecast.
What drives startup costs by type of business
| Type | Usually the biggest costs | Watch out for |
|---|---|---|
| Service business | Equipment, licences, marketing | Months of salaries before clients pay |
| Retail or online store | Opening stock, website, storage | Stock that sells slower than planned |
| Food and beverage | Fit-out, equipment, licences | Long fit-out delays and health permits |
| Manufacturing or wholesale | Machinery, raw materials, premises | Supplier minimum orders and payment terms |
Common mistakes when estimating startup costs
- Leaving out the cash buffer and planning only for opening day.
- Forgetting deposits, taxes and fees that are due before trading.
- Assuming an opening date that is too early.
- Not paying yourself, then running out of personal cash.
- Treating stock as a one-off cost when you have to restock before customers pay.
Frequently asked questions
What are startup costs?
The money you spend to get a business ready to sell and to keep it running until it covers its own costs: one-time setup costs plus ongoing costs before break-even.
What is the difference between startup costs and working capital?
Startup costs include everything needed to open and reach break-even. Working capital is the cash tied up in day-to-day operations, such as stock and money customers owe you. Your startup budget should include enough working capital to restock and pay bills before customers pay you.
How much cash buffer do I need?
A cautious rule is your monthly fixed costs × the number of months until break-even. In the example above that is 4 × $660 = $2,640.
How do I estimate startup costs without quotes?
Use listings, supplier price lists and similar businesses’ published costs as a starting point, mark those lines as estimates, and replace them with quotes before you commit money.
Should startup costs be in my business plan?
Yes. Lenders and investors expect a startup cost table in the financial section, with how you will fund it. See how to write a business plan.
Is there a startup costs template?
Use the calculator above as your template: the lines match the five steps, and you can carry the result into a full forecast in BznsBuilder.
Source: U.S. Small Business Administration, Calculate your startup costs. For your first forecast, see how to forecast without historical data.
Turn startup costs into a launch plan
See how long your money lasts after launch.
- P&L
- Cash flow
- Scenarios
