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Cash Runway Calculator
Model cash flow over 24 months. See when you reach break-even, how long cash lasts, and when to plan the next raise.
Free to use · No signup · Calculations run in your browser · Choose any currency
Works for any market. Enter your own costs and rates.
01
Your numbers
All fields update the 24-month projection.
Cash balance projection
Yellow = positive, red = negative.
M1
M12
M24
Month-by-month projection
| Month | Revenue | Costs | Net flow | Cash balance |
|---|---|---|---|---|
| Month 1 | $800,000 | $910,000 | -$110,000 | $2,390,000 |
| Month 2 | $864,000 | $938,800 | -$74,800 | $2,315,200 |
| Month 3 | $933,120 | $969,904 | -$36,784 | $2,278,416 |
| Month 4 | $1,007,770 | $1,003,496 | +$4,273 | $2,282,689 |
| Month 5 | $1,088,391 | $1,039,776 | +$48,615 | $2,331,304 |
| Month 6 | $1,175,462 | $1,078,958 | +$96,504 | $2,427,809 |
| Month 7 | $1,269,499 | $1,121,275 | +$148,225 | $2,576,033 |
| Month 8 | $1,371,059 | $1,166,977 | +$204,083 | $2,780,116 |
| Month 9 | $1,480,744 | $1,216,335 | +$264,409 | $3,044,525 |
| Month 10 | $1,599,204 | $1,269,642 | +$329,562 | $3,374,087 |
| Month 11 | $1,727,140 | $1,327,213 | +$399,927 | $3,774,014 |
| Month 12 | $1,865,311 | $1,389,390 | +$475,921 | $4,249,936 |
| Month 13 | $2,014,536 | $1,456,541 | +$557,995 | $4,807,930 |
| Month 14 | $2,175,699 | $1,529,065 | +$646,634 | $5,454,565 |
| Month 15 | $2,349,755 | $1,607,390 | +$742,365 | $6,196,930 |
| Month 16 | $2,537,735 | $1,691,981 | +$845,754 | $7,042,685 |
| Month 17 | $2,740,754 | $1,783,339 | +$957,415 | $8,000,099 |
| Month 18 | $2,960,014 | $1,882,006 | +$1,078,008 | $9,078,107 |
| Month 19 | $3,196,816 | $1,988,567 | +$1,208,249 | $10,286,356 |
| Month 20 | $3,452,561 | $2,103,652 | +$1,348,908 | $11,635,264 |
| Month 21 | $3,728,766 | $2,227,945 | +$1,500,821 | $13,136,085 |
| Month 22 | $4,027,067 | $2,362,180 | +$1,664,887 | $14,800,972 |
| Month 23 | $4,349,232 | $2,507,155 | +$1,842,078 | $16,643,050 |
| Month 24 | $4,697,171 | $2,663,727 | +$2,033,444 | $18,676,494 |
Scenario estimate based on your inputs. It does not connect to your store or replace actual settlement and cost reports.
How to use this calculator
Enter starting cash, monthly revenue, growth, fixed expenses, variable cost ratio and marketing spend. Review the month-by-month balance rather than relying only on the first month of burn.
Worked example
With ₹600,000 cash and a constant ₹100,000 monthly cash deficit, the simple runway is six months. If revenue or costs change, use the monthly projection to see when the balance becomes negative.
What the estimate leaves out
The model does not automatically include inventory payment timing, settlement delays, debt, tax payments or fundraising. Use a detailed cash-flow forecast for commitments; a projected break-even month is not assured.
Use inputs from the same reporting period and compare the result with your actual costs before making a decision.
Explore ai & marketing services ↗How to Build an AI Brand Context Workflow ↗ · Read the complete cash runway guide ↗
How long could your cash last under this growth scenario?
- Monthly burn
- The first month’s cash deficit when modelled costs exceed revenue. Burn can change across the projection.
- Cash runway
- The first projected month whose closing cash balance reaches zero or below. “24+ months” means the balance lasts through this projection, not indefinitely.
- Break-even month
- The first projected month when revenue covers modelled fixed, variable and marketing costs. It does not necessarily recover earlier cash losses.
Why it matters
Why Runway Planning Is Critical for D2C Startups
A 24-month forward view connects growth, margins, and spending to the cash balance founders actually have to manage.
- 01
Know when to fundraise
Work backwards from your cash-out date so fundraising starts while you still have negotiating room.
- 02
Model growth scenarios
Compare how different MoM growth rates change break-even and ending cash.
- 03
Optimise spend timing
See the effect of fixed and marketing spend on each month’s cash position.
Frequently asked
Straight answers.
How is runway calculated?
Each month calculates revenue minus fixed costs, variable costs, and marketing spend, then adds that net flow to the running cash balance.
What is burn rate?
Burn rate is the amount of cash lost in a month when total costs are greater than revenue.
When should I start fundraising?
Plan well before projected cash-out; the right lead time depends on deal complexity, investor readiness, and your fallback options.
What's a healthy variable cost ratio for D2C?
It depends on category and pricing. The ratio must leave enough gross contribution to cover fixed costs, marketing, and an acceptable profit.
Check the next part of the picture.
Inventory Reorder Point Calculator ↗
Set a reorder point from daily sales, supplier lead time, and a safety buffer.
Calculation method and examples maintained by MlabsGrowth. See the assumptions above before using an estimate.
Number worse than you expected?
Bring it to a free 30-minute audit. We rank the leaks we can see and name the one to close first — the list is yours to keep.
