Runway is a model, not a division problem
Cash divided by last month's burn is the version that fails first. A working runway model separates gross burn, what the company spends, from net burn, spend minus collections, layers in offers signed but not yet on payroll, and treats lumpy inflows honestly. Annual-prepaid deals are the classic distortion: twelve months of cash land at once, flatter the current quarter, then leave a renewal cliff exactly one year out.
Two inflows get modelled conservatively on principle. The SR&ED refund arrives after filing and sometimes after review, so it sits in the forecast at a prudent date and never gets spent in advance. HST refunds from zero-rated sales follow the filing cadence, which is itself a lever, since electing monthly filing brings them in faster.
Underneath the monthly model sits a 13-week cash view, because payroll dates, HST timing and annual software renewals all land on specific days, and a quarter of apparent runway can be an illusion of averaging. The weekly view is where a founder learns that the model says eight months but the third week of March says something sharper.
The MRR schedule a board actually reads
Investors do not want an MRR number, they want its movement: new, expansion, contraction and churned MRR, month by month, reconciled to the revenue recognized in the ledger. The reconciliation is the credibility step, because billing systems are optimists that count the signed, the paused and the not-yet-cancelled alike. Cohort retention sits beside the bridge, showing whether the customers acquired a year ago still pay today.
None of this can be built on cash-basis books, which is why our CFO work sits on the monthly close from End-to-End Accounting: deferred revenue handled properly is the raw material, and the MRR bridge is the product. The same discipline stops the quiet inflation of presenting one large annual contract as ARR, as if it were twelve reliable months.
Gross margin sets the ceiling on what growth is worth
A growth rate only means something at a known margin, so cost of revenue stays honest: hosting, third-party API and model usage fees, support staffing, and the per-customer infrastructure creep that shows up when usage grows faster than pricing. When margin drifts, the CFO conversation is concrete rather than motivational: reprice the heaviest tier, cap included usage, restructure the hosting commitment, and re-run runway under each option before the board meets.
Headcount decides the rest, because payroll is the dominant line in almost every startup's burn, which makes the hiring plan the real financial model. Each offer is a permanent change to net burn, and each contractor converted to an employee moves cost, source deductions and, once payroll grows enough, Ontario's Employer Health Tax onto the corporate side. We keep the hiring plan and the forecast in one place, so an offer letter never goes out without its runway consequence attached.
The board question, and the schedule that answers it
| Question in the board meeting | The schedule that answers it |
|---|---|
| How many months can we run? | 13-week cash forecast rolling into a monthly runway model |
| Is the growth real? | MRR movement bridge plus cohort retention |
| What is growth costing us? | Sales and marketing spend set against new MRR added |
| Could we survive diligence next quarter? | Closed books, the deferred revenue schedule, a cap table agreeing with the ledger |
| When do we raise? | Scenario model: the hiring plan against runway under each case |
The point of the table is cadence. Each schedule exists before the meeting, updates monthly, and says the same thing the ledger says, so board time is spent on decisions instead of number archaeology.
Raise preparation is a finance project, not a deck project
Diligence is where fractional CFO work pays for itself: a data room where the model ties to the closed books, SAFEs sitting correctly on the balance sheet, tax filings current, and the deferred revenue balance ready to be explained rather than discovered. Walla Assaf's background in banking and corporate finance shapes this stage, including the question founders skip, whether the next money should be equity at all. An operating line or venture debt sized against the balance sheet is a conversation our Business Financing Advisory runs alongside the Fractional CFO engagement itself.
We work with funded and bootstrapped software companies across Mississauga and the GTA, on a monthly scope quoted in writing after a free 15-minute discovery call.
