$0.00
Setup + 1 × monthly costs + cushion

What does it take to open — and stay open? Separate the costs of getting started from the money you need each month, then plan for one month, three months, a year or your own timeline.
Consulting, design or another service business. Blank costs count as zero.
Examples are invented to demonstrate the math, not industry quotes. Use local prices and include any applicable taxes in your costs.
Equipment, deposits and opening stock belong here.
Include your own pay if the business needs to support you.
A cash budget before any sales come in.
The total budget minus cash already available, never below zero.
All figures use USD. Changing currency changes the label, not the amounts or exchange rate.
Same setup costs and monthly spending, with your 0% cushion included. Cash available is not deducted from these totals.
Setup + 1 × monthly costs + cushion
Setup + 3 × monthly costs + cushion
Setup + 12 × monthly costs + cushion
Setup is the sum of your opening costs. A deposit uses cash even if it may be refundable later. Opening inventory is counted here; only later replenishment belongs in the monthly budget.
Running budget = monthly costs × number of months. For example, 500 a month needs 1,500 for three months or 6,000 for a year. Divide annual bills by 12 for this average-month framework; actual payment dates can require extra cash sooner.
Total = (setup + running budget) × (1 + cushion ÷ 100). With 1,000 in setup costs, 500 per month for three months and a 10% cushion, the total is 2,750. If you already have 1,000, the gap is 1,750.
This assumes steady monthly costs and no sales, inflation or financing. Include repayments, taxes and extra costs in the relevant rows if they apply. Expected sales are not automatically cash in hand; profitability and payment timing need separate checks.
Check how many sales cover costs, then look at money coming in and going out.
Check break-even Explore cash flow