Cash & Runway Forecasting for Vertical SaaS
You know your burn rate. You don't know your cash position — not when Stripe payouts, payout schedules, and collections all move on their own timing.
Payments founders don't run out of money. They run out of visibility.
Most vertical SaaS are making growth decisions on numbers that don't reflect what the business actually earns. Here's what that looks like in practice.
Payment volume and usage tracked incorrectly means invoices go out short. Customers pay what they're billed — not what they owe. The gap compounds every month until someone runs the reconciliation.
Month-to-month GPV swings make it nearly impossible to forecast confidently. Growth decisions get deferred, targets get missed, and the board gets a different story every quarter.
Gross and net revenue reported interchangeably. Platform fees, interchange, and passthrough costs buried in the wrong line. The P&L looks better than it is until an investor or auditor pulls the thread.
Payment fees and passthrough costs accounted for incorrectly inflate apparent margins. Spend decisions get approved against a gross number. The real cost of growth only shows up when cash gets tight.
Deploy capital into growth — without running out of runway
Full visibility, 12 months out
- Rolling 12-month forecast tied to your actual billing and payment cycles
- 13-week near-term view for operational cash management
- Gross and net burn — both tracked, not just total spend
- Milestone-based runway targets — how long to each one
Model decisions before you make them
- Hire earlier or later — see the runway impact before committing
- Lose a key client — know how much buffer you have
- Change pricing — model cash timing before you reprice
- Raise a bridge — see what it buys under each scenario
Maintain the buffer to keep investing
- Minimum runway thresholds defined for each growth scenario
- Early warning when burn is drifting ahead of revenue milestones
- Raise timing modeled — how long before you need to start
- Buffer preserved so you invest from strength, not desperation
One-time engagement from $4,750 · Optional quarterly re-forecast from $1,750
Fixed pricing, scoped to your billing complexity.
Book a callYour cash position is either a constraint or an advantage — the forecast tells you which
The model works for either objective — and most founders are balancing both at once.
Maximize growth
How fast can you grow without burning through runway before your next milestone?
- Model how much you can invest at your current burn
- See which growth bets extend runway vs compress it
- Set a minimum cash buffer — invest everything above it
- Know when aggressive hiring tips into a fundraise risk
Improve unit economics
Where do you cut or reprice to extend runway without sacrificing growth momentum?
- Model the cash impact of repricing underperforming contracts
- See how margin improvement extends runway without raising
- Identify which expenses reduce burn with the least growth impact
- Build a path to cash-flow positive with a clear milestone timeline
What you're buying
A one-time engagement, delivered in 1–2 weeks. Here's exactly what happens.
Inputs
Day 1–3We collect your actuals — billing data, Stripe payouts, payroll cadence, collections history, and planned spend. We map your payout schedule, chargeback exposure, and any in-transit funds sitting between processors and your bank account.
- Stripe, billing, and bank data connected or exported
- Payout timing, chargeback reserves, and collections mapped
- Planned hires, contracts, and growth bets documented
Build
Days 3–7We build the 13-week and 12-month models in Excel, tied to your real cash drivers — not generic burn assumptions. Scenarios are built in from day one: conservative, base, and aggressive.
- 13-week operational cash model
- 12-month strategic forecast with milestone-based runway targets
- Scenario tabs: client churn, hire timing, pricing change, bridge raise
Deliver
Week 2You receive the model, a 30-minute walkthrough, and a written summary of the three decisions the forecast changes right now.
- Excel model — founder-operated, no finance background required
- 30-minute walkthrough of every driver and assumption
- Written summary: top 3 decisions this forecast changes immediately
Common Questions
How do you forecast revenue for a vertical SaaS company?
Revenue forecasting for payments businesses requires modeling each stream independently — not applying a single growth rate to total revenue. At Bridges, we build every forecast from the underlying transaction and customer economics.
- GPV — transaction volume modeled by customer segment or cohort
- Take rate — gross and net after processing fees, modeled separately
- Net revenue — what flows to the P&L after all fees
- Subscription or software revenue — recognized separately from payments
- Churn and expansion — modeled by cohort, not as a single blended rate
How do you forecast runway for a vertical SaaS company on Stripe?
A bank balance is not a runway forecast. At Bridges, we build 13-week and 12-month rolling forecasts that account for the timing complexities specific to Stripe-based businesses.
- 13-week near-term view — operational cash management, accounts for payout timing and payroll alignment
- 12-month rolling view — strategic planning and milestone targeting
- Gross and net burn tracked separately
- Stripe payout delays, reserves, and settlement timing built into cash timing
- Milestone-based runway targets — not just months of cash remaining
What's the difference between gross burn and net burn for a vertical SaaS company?
Gross and net burn tell two different stories — and conflating them leads to bad fundraising timing. At Bridges, we track both every month as part of every engagement.
- Gross burn — total cash out each month: payroll, vendors, and fees
- Net burn — gross burn minus cash collected from customers
For vertical SaaS, net burn can be distorted by Stripe payout timing — cash collected and cash deposited often fall in different periods.
Fundraising timing should be driven by net burn and your lowest projected cash point — not an average.
How does Stripe payout timing affect cash flow for a vertical SaaS company?
Stripe payout timing is one of the most common sources of cash flow surprises for vertical SaaS. At Bridges, we build payout timing directly into every cash forecast so nothing catches a founder off guard.
- Initial delay — first payout held 7–14 days after the first payment is received
- Rolling delay — standard US payouts settle on a 2-day delay
- Reserves — Stripe can hold 10–25% of volume during high-growth or high-chargeback periods
A runway forecast that ignores payout timing will overstate available cash and compress your fundraising window.
Know your number before the board asks
A delayed payout, an unexpected churn, a hire that wasn't modeled — any of these can turn a healthy runway into a crisis in 90 days. A 15-minute call is enough to scope what you need.