How Much Cash Do I Need Before My First Customers Pay?

By Bill Stilwell · Last reviewed October 16, 2026

The short answer

Add up your one-time startup costs, then add the gap between what you’ll spend and what you’ll collect each month until sales reach break-even. That total is the cash you need before customers pay enough to carry the business. Most of the gap comes from slow early months and from paying for labor and materials before customers pay you.

What this means

The outline asks you to determine how much cash is required before customers pay.

There are two parts:

Startup costs. The one-time costs to open. The U.S. Small Business Administration (SBA) lists things like equipment, licenses and permits, insurance, legal and accounting help, inventory, marketing, and a website.
The early gap. The money you lose each month while sales are below break-even. Plus the money tied up when you pay for a job before the customer pays you (see 7.1.10 Payment Timing).

Example: a handyman business needs a used van, tools, insurance, a license, a website, and signs. That’s the startup cost. In month 1, the owner expects few jobs. By month 4, jobs should reach break-even. The owner adds up each month’s shortfall for months 1 to 3. Since most jobs are paid on completion and materials are bought first, the owner adds about two weeks of material costs too. Startup costs plus the gap is the cash needed.

Why it matters

Cash runs out before profit shows up. A business can have good jobs booked and still run out of money waiting to be paid.
It tells you whether to start now. If you can’t cover this number, you may need to start smaller or wait (see 7.9 Proceed, Revise, or Stop Decision).
Lenders ask for it. Banks and credit unions often want a business plan and an expense sheet with projections.
It protects your personal finances. Knowing the number helps you avoid draining household savings without a plan (see 6.1.1 Personal Cash Runway).

Who this applies to

Every new business and every major expansion. It’s biggest for businesses that buy equipment, materials, or inventory up front, and for those that bill after the work is done.

How to do it

List every one-time startup cost. Use real quotes and published fees where you can.
Add up your monthly fixed costs (see 7.8.10 Fixed Costs).
Estimate jobs or sales for each of your first 6 to 12 months. Be cautious in early months.
For each month, figure money in (from paid jobs) and money out (fixed costs plus job costs).
Shift money in to the month customers actually pay, not the month you do the work.
Mark each month’s shortfall. Add them up until the business covers its own costs.
Add the startup costs to the total shortfall.
Add a cushion. The SBA suggests adding about 10 percent for unexpected costs.
Look for ways to shrink the number: deposits (see 10.7.2 Deposits), progress payments, leasing instead of buying, or starting with fewer services.
Decide how you’ll fund it. Savings, a loan, or other sources (see 24.7 Funding Options).

What proof to keep

Your startup cost list with quotes and fee sources
A month by month cash plan for the first 6 to 12 months
Your funding plan and any loan documents
Notes on how you lowered the number

Keep these with your business plan. A lender or partner will want to see them.

Common mistakes

Counting sales when you do the work instead of when you get paid. A job finished in March and paid in April is April money.
Assuming you’ll be busy from day one. Early months are usually slow while reviews and word of mouth build.
Forgetting taxes. Estimated tax payments can come due before you expect (see 7.8.14 Cash Reserve).
Spending it all on equipment. Leave enough for marketing and your first months of overhead.
Confusing this with a cash reserve. Startup cash gets you to break-even. A reserve covers surprises after that.

When to get help from a pro

A certified public accountant (CPA) can check your cash plan and help with taxes in your first year. A Small Business Development Center (SBDC) adviser can help you prepare for a loan. Ask:

Does my cash plan look realistic for a new business in my trade?
What tax payments should I plan for in my first year?

Bill’s note

[Bill: add a short story or opinion here. For example, what you set aside to start SiteSmarty, or a client who ran short on cash in the first few months and what they did.]

How I did this for SiteSmarty

[Date I did this:]
[What I actually did, step by step: my startup costs, my monthly plan, and the total I needed]
[What it cost and how long it took:]
[What surprised me or what I’d do differently:]
[Screenshot or photo to add, with private info blurred: my startup cost list and cash plan]
[Result so far:]

Questions people ask

How much money do I need to start? Your startup costs plus the shortfall in each early month until sales cover costs, plus a cushion. The number depends on your trade and how fast you get customers.

What are startup costs? One-time costs to open, like equipment, licenses, insurance, legal and accounting help, inventory, marketing, and a website.

How do deposits help? A deposit brings in money before you buy materials or start work, so less of your own cash is tied up in each job.

What’s the difference between startup cash and a cash reserve? Startup cash gets you through launch until break-even. A reserve is money you keep after that for slow months and surprises.

Audit check

Question: Has the owner calculated startup costs plus the early monthly shortfall, based on when customers actually pay, and planned how to fund it?
Pass looks like: A startup cost list with sources, a month by month cash plan with payment timing, a total with a cushion, and a funding plan.
Fail looks like: No cash plan. Sales counted when work is done, not when paid. No cushion. Funding not decided.
Evidence to collect: The startup cost list, the cash plan, and funding documents.

Where this fits

Do this first: 7.8.11 Break-Even Point, 7.1.10 Payment Timing

Do this next: 7.8.13 Maximum Customer Acquisition Cost

Sources

U.S. Small Business Administration, "Calculate your startup costs" (checked October 16, 2026)
U.S. Small Business Administration, "Break-even point" (checked October 16, 2026)

This page explains general rules and Bill's own experience. It is not legal, tax, or insurance advice. Talk to a qualified professional about your situation.