How to build a startup budget you can actually fund
Your funding requirement is the cash needed to open, plus the largest cumulative cash deficit after opening, plus the balance you want to retain. Build those three amounts separately, then match committed funding to the dates the money leaves your account.
What you will produce: A funding total, a dated payment ledger and a clear amount still to arrange.
Updated September 6, 2026 · Worked examples and editable worksheets
What to have ready
Bring equipment and premises quotes, a paid staffing plan, customer collection assumptions and the amounts and dates of committed financing. An unknown cost stays unresolved in the ledger; entering zero would hide it.
Work through the calculation and decision
What belongs in the opening-payment ledger?
Write one row for each cash commitment: deposits, installed equipment, fit-out, opening inventory, pre-opening paid work and any verified fees. Record the amount, due date, refundable portion, source and what is excluded. Separate a supplier deposit from its final balance so the same purchase is not entered twice.
Choose a boundary date, such as the first trading day. Payments before that date belong in the opening ledger; later payments belong in the operating cash schedule. Moving a bill between these schedules must leave the combined funding need unchanged. Equipment depreciation belongs in the profit view, while the actual equipment payment belongs in cash.
How much operating cash should you add?
Forecast cash receipts and payments by week through the difficult opening period. Accumulate the net movements from zero. The absolute value of the most negative cumulative balance is the operating deficit to fund. Adding every loss-making week separately would overstate the need when positive weeks partly replenish cash.
For example, net movements of −$7,000, −$5,000 and +$3,000 produce cumulative movements of −$7,000, −$12,000 and −$9,000. The deficit is $12,000. Extend the forecast if the business has not reached a sustainable pattern by its end.
How do you choose a reserve and test the funding date?
Define the reserve in terms of commitments you need to withstand: a delayed opening, a late customer payment or an equipment failure. Use the cash schedule to estimate the consequence. Keep this retained reserve separate from the deficit already modeled.
List only funding that is committed on usable terms. A possible loan or an expected grant belongs in an unresolved funding row. Compare the available bank balance with each major payment date, including the period before trading begins. A sufficient total arriving after the equipment deposit is due still leaves a gap.
A $65,000 plan with $50,000 committed
This authored opening budget uses a small service business solely to explain the method. None of the amounts is a local quote.
| Funding component | Illustrative amount | Treatment |
|---|---|---|
| Opening payments | $45,000 | One-time cash before trading |
| Largest cumulative operating deficit | $12,000 | Lowest point in the operating schedule |
| Retained cash buffer | $8,000 | Cash intended to remain available |
| Total requirement | $65,000 | $45,000 + $12,000 + $8,000 |
| Committed funding | $50,000 | Available on the required dates |
| Unfunded amount | $15,000 | Resolve before making dependent commitments |
What this changes: Reducing the opening scope by $5,000 lowers the gap to $10,000 only if the change does not reduce sales or create an offsetting cost. Test both effects before accepting the saving.
Illustrative amounts are rounded for display. Use the full inputs and stated units when recalculating; an approximate threshold is not itself a sufficient activity prescription.
Calculate the funding still to arrange
Start with the worked inputs, then change a value to test your own scenario. All money amounts are in USD. The result updates in this tab.
Change the opening payments or cash deficit first. The funding gap is a total; check when committed funds arrive against each payment date.
Calculations keep the full entered precision; displayed amounts are rounded independently. A blank, out-of-range or disallowed fractional count clears the result. Reset example restores the exact worked inputs. JSON and CSV downloads contain that same valid scenario; the worksheet download also includes your evidence and decision.
Illustrative result · assumptions apply
- Total funding required
- $65,000.00
- Funding still to arrange
- $15,000.00
- Funds above the planned requirement
- $0.00
Match the dates of committed funds to the payment schedule. A total alone cannot show a late funding arrival.
Complete your decision record
A funding total, a dated payment ledger and a clear amount still to arrange. Enter the finding or number, the source and the next action for each row. “Supported” records your assessment of that item; it does not approve the business or certify completed research.
| Item and what to record | Your finding and evidence | Status and next action |
|---|---|---|
| Opening paymentAmount, due date, quote, refund terms and exclusions | ||
| Operating deficitForecast period, lowest cumulative balance and its date | ||
| Retained reserveDisruption covered and how its cash effect was estimated | ||
| Committed fundingNet usable amount, availability date and conditions | ||
| Funding gapAmount still missing and the commitment it prevents |
5 items have no evidence recorded yet.
Entries are temporary and are not sent to us or saved automatically. Download your completed work before leaving or refreshing this page.
Choose your next action
| If your finding is… | Your next action |
|---|---|
| A payment date precedes usable funding | Delay or renegotiate that commitment, or arrange confirmed funding before it falls due. |
| A material cost is unquoted | Keep the total provisional and obtain the missing scope and quote. |
| The operating deficit keeps growing at the forecast end | Extend the forecast and revisit operating viability before treating the reserve as sufficient. |
Errors that can change the result
- Adding equipment cash and depreciation to the same cash budget.
- Counting loan proceeds as sales or a refundable deposit as freely available cash.
- Replacing a dated forecast with an unexplained number of months of expenses.
Apply this to your business
Choose the matching format and check its customer unit, paid team and evidence limits.
Restaurant
48-seat counter-service restaurant
Open the operating guide and state profiles →Coffee Shop
Independent coffee shop without a drive-through
Open the operating guide and state profiles →Cleaning Business
Two-person commercial cleaning team with recurring accounts
Open the operating guide and state profiles →Hair Salon
Three-stylist employee salon with booked appointments
Open the operating guide and state profiles →Auto Detailing Business
Two-technician fixed-site detailing studio
Open the operating guide and state profiles →Use the full cash and funding tools after completing the opening ledger. Values entered here are not automatically transferred to another calculator.
Continue with the next part of your plan
- How to compare equipment quotes and build the opening budget
A comparable two-quote cost calculation and a supplier commitment record.
- How to build a 13-week cash plan for your first 90 days
A weekly cash schedule, the lowest balance and the extra funding needed to retain your chosen minimum.
- How much startup financing do you need, and can you repay it?
A sources-and-uses brief, a net funding gap and a repayment scenario to discuss with a lender.
Sources and limits
The sources below provide the stated background. The worked examples, calculator defaults and decision exercises are authored teaching material. They do not establish market prices, local demand, legal applicability or completed state research.
- SBA: planning a business
Background on costs, demand and break-even.
- IRS: business recordkeeping
Keeping supporting business records.
Source background and its scope are stated above. The guide update date does not change a source observation period. Research and review standards · Report an issue
When you need a longer financial plan
Use a financial model to organize a broader forecast after defining your own operating assumptions. The site’s research, your worksheet entries and any purchased workbook are separate; entries are not transferred automatically.
Financial models