What this calculator includes
- Editable one-time launch and recurring cash lists, with already-paid launch amounts tracked separately.
- A 1–24 month schedule of customer cash collections and additional payments, with no assumed growth.
- Reserve based on the deepest cumulative trading deficit plus your chosen cash floor.
- Contingency on unpaid launch cash only, with available funds and the remaining gap shown separately.
- Service and online-store fictional examples, zero-receipts stress test, CSV snapshot and print option.
- Currency labels without exchange conversion; your inputs stay in this tab’s memory.
How to calculate business startup costs and the cash needed now
- List the new cash payments needed to open: setup, deposits, equipment, initial stock, permits and other applicable items. Use supplier evidence from your own location. A category is a prompt, not a compulsory purchase.
- Enter the already-paid part beside each launch budget. Enter the unrestricted cash still available after those payments. An asset you already own with no new cash payment belongs in your asset record, not as a second purchase here.
- Build a monthly baseline from cash commitments you will actually pay: workplace, software, insurance, paid team and owner support. Include each commitment once. Annual premiums paid upfront should be scheduled when due rather than charged twice as an upfront and monthly payment.
- Choose the trading horizon. Enter usable customer cash collections and extra payments by month, including changing inventory purchases, delivery costs or debt payments that you decide to model. Do not enter projected invoices as bank receipts.
- Choose a minimum cash floor and a contingency percentage for unpaid launch costs. There is no universal percentage or horizon that makes a launch adequately funded. Review the full planning period as well as near-term dates.
- Review the deepest cumulative deficit, funding gap and individual months. Run the zero-receipts stress case. Replace estimates after quotes, paid pilots and settlement evidence improve, then carry the actual dates into the 13-week forecast.
Startup funding formula: launch payments plus the cash shortfall
Unpaid launch cash = sum of launch budgets − sum already paid. The launch contingency = unpaid launch cash × your contingency percentage ÷ 100. A refundable deposit is still cash unavailable for trading; this does not make it an accounting expense.
For each month, net trading cash = customer cash collected − baseline monthly cash payments − additional payments. Cumulative trading cash starts at zero and adds each net month. The trading reserve is the largest cumulative shortage, not the sum of all negative months. Earlier trading surpluses can support later payments within this month-end model.
Deepest deficit = max(0, −minimum cumulative trading cash). Required cash now = unpaid launch cash + launch contingency + deepest deficit + chosen minimum cash floor. Funding gap = max(0, required cash now − available cash now). Cash above the requirement = max(0, available cash − required cash).
The historical launch payments are shown for the full plan but are not charged a second time against the cash available now. A zero funding gap means only that the entered monthly scenario is covered. It does not establish that customers will buy, a loan will arrive or a quote will hold.
Worked startup-cost examples with a reconciled cash path
| Measure | Service example | Online-store example |
|---|---|---|
| Total launch budget / paid | $2,500 / $500 | $4,600 / $0 |
| Unpaid launch / contingency | $2,000 / $200 | $4,600 / $460 |
| Monthly baseline cash | $2,800 | $1,200 |
| Monthly customer receipts | $1,000; $2,000; $3,000 | $1,000; $2,000; $3,000 |
| Extra cash paid by month | $0; $0; $0 | $800; $1,000; $1,200 |
| Cumulative trading cash | −$1,800; −$2,600; −$2,400 | −$1,000; −$1,200; −$600 |
| Deepest deficit / required cash | $2,600 / $5,800 | $1,200 / $7,260 |
| Available cash / funding gap | $3,000 / $2,800 | $4,000 / $3,260 |
In the service example, a $200 positive third month does not erase the earlier $2,600 funding need. Funding exactly $5,800, paying the $2,000 launch balance and leaving $200 contingency untouched produces a lowest uncommitted balance of $1,000 and a final balance of $1,200.
The online-store example puts $3,000 opening stock inside the launch budget. Its monthly extra payments are new replenishment and other variable cash, not a repeat of that same opening purchase or a second cost-of-goods-sold deduction. The ecommerce startup guide has other examples; loading this preset does not import those examples or their timing.
What belongs in a small-business startup budget?
| Payment | Where to enter it | Evidence and boundary |
|---|---|---|
| Equipment and fit-out | Launch budget if paid before trading | New payment only; record existing owned assets separately |
| Opening stock | Launch budget if paid before trading | Count stock on hand and supplier payment date; avoid repeating the same purchase later |
| Deposit and prepaid rent | Launch budget if paid before trading | Separate refundable cash tied up from recurring rent and expense recognition |
| Permits and professional setup | Launch or extra monthly payment when due | Use the actual requirement and current quote; no jurisdictional fee is assumed |
| Annual insurance or software prepayment | Launch or extra monthly payment when due | Do not also enter the same covered amount as a monthly cash payment |
| Owner support and payroll | Monthly baseline or dated extra cash | Use one owner-compensation boundary; include additional employer payments if applicable |
| Processor deductions, refunds and shipping | Collections net of deductions, or extra payments | State the chosen basis and never deduct the same item twice |
| Loan proceeds and debt service | Usable current funding / extra cash payments | Promised proceeds are not current funds; future principal and interest must be included once if modeled |
What changes when customer receipts arrive late?
Set the default service receipts to zero while leaving every cost unchanged. Three months of $2,800 baseline cash produces an $8,400 cumulative shortage. Add $2,000 unpaid launch, $200 contingency and $1,000 floor: required cash becomes $11,600. With $3,000 available, the gap is $8,600. This is a stress case, not a probability estimate.
A late collection can move the lowest point even when total eventual sales are unchanged. Move a receipt to the month it can actually be used. If a processor settles after payroll is due within the same month, this tool’s monthly netting can still hide the shortage. Use the dated forecast for that decision.
Shortening the horizon can make the displayed requirement smaller by excluding later commitments. It does not remove those commitments. Review the horizon, stock replacement, tax dates, debt service and owner needs before describing a plan as funded.
Startup funding is different from break-even sales and cash runway
This page answers how much cash covers launch payments and an entered early cash path. The monthly break-even calculator answers how much contribution is needed to fund recurring commitments and a profit goal. A startup can need substantial opening cash even if its later monthly break-even target is achievable.
Cash runway starts with available cash and asks how long an ongoing cash gap can be sustained. A general startup budget also records payments needed before trading begins. Neither substitutes for a full financial model, a lender-requested business plan or a schedule of actual bank dates.
Assumptions and limits
This is a monthly startup cash planning model, not a forecast of demand, profit, business valuation, loan approval or tax deductibility. All unpaid launch spending is assumed due before month one. Trading payments and receipts are netted at each month end; an earlier supplier payment or delayed settlement can require more cash than shown. The contingency percentage applies only to unpaid launch items and is held aside, not spent in the schedule. The cash floor is an additional chosen minimum. Baseline payments remain constant; add changing amounts in the monthly schedule. Available cash is unrestricted money usable now after historical payments, not expected loans or future customer collections. Costs and receipts outside the entered horizon are excluded. No tax, debt payment, owner pay, refund, fee or replacement cost is supplied unless you enter it. Input amounts are limited to 1 billion per field; monetary displays round to two decimals while the calculation retains greater precision.
Frequently asked questions
How much does it cost to start a small business?
There is no universal amount in this calculator. The result comes from your launch payments, paid amounts, cash collections, ongoing payments and chosen reserve. The presets are fictional cases rather than typical prices.
Why subtract already-paid startup costs?
They remain in the full launch budget, but the same historical payment must not be deducted again from cash that is already measured after payment. Available cash must use that same cutoff.
Does the reserve equal monthly overhead times a fixed number of months?
Only if there are no customer receipts or changing payments. This tool calculates the deepest cumulative trading deficit in your entered schedule, then adds the cash floor you choose.
What costs receive the contingency percentage?
Only unpaid launch costs. The tool shows that amount separately and leaves it aside. It does not apply the percentage to historical paid items, monthly payments or the selected floor.
Can I include inventory, deposits and owner pay?
Yes, as cash payments with a clear timing boundary. Opening inventory and refundable deposits still tie up cash. Count owner support once and avoid duplicating a stock payment through both launch costs and monthly cost of goods sold.
Can I download the startup budget?
Download a CSV snapshot of the current cost lists, inputs, funding result and monthly schedule, or use browser print/save PDF. The CSV contains values and does not recalculate. No Excel formula workbook or Google Sheets compatibility is claimed.
Does a zero gap mean I am ready to launch?
It means your available cash covers the entered month-end scenario. Confirm quotes, practical capacity, actual payment dates, customer evidence and funding availability separately.
Does changing currency convert the amounts?
No. Currency selection changes labels only. Enter all amounts in one consistent currency.
Method references
Turn the budget into dated cash decisions
Use actual supplier due dates, payroll dates and settlement delays to find shortages hidden by monthly netting. Start with usable cash after paid costs.
Build my dated 13-week forecast →Explore Pro plan comparisonsPublished by MyBreakeven. Method and examples checked . Business calculation methodology · Check scope and corrections.