What if your biggest client leaves?
Take your biggest client out of the plan for a moment — or turn the churn rate up — and revenue, margin and runway recalculate on the spot. Your plan stays untouched until you keep it.
3
inputs
€448k
ARR in 6 months
19 mo
runway
Subscription model
| Aug 26 | Sep 26 | Oct 26 | Nov 26 | Dec 26 | Jan 27 | Feb 27 |
| Revenue | |||||||
Subscription revenue | €36,400€36,400 | €36,800€36,800 | €37,200€0 | €38,200€0 | €39,200€0 | €40,200€0 | €41,200€0 |
New customers / moStripe | 6 | 6 | 6 | 9 | 9 | 9 | 9 |
Churn rateStripe | 2.1% | 2.1% | 2.1% | 2.1% | 2.1% | 2.1% | 2.1% |
ARR per customerStripe | €2,400 | €2,400 | €2,400 | €2,400 | €2,400 | €2,400 | €2,400 |
Active customers | 182 | 184 | 186 | 191 | 196 | 201 | 206 |
Onboarding & services | €3,800€3,800 | €3,800€3,800 | €3,800€0 | €3,800€0 | €3,800€0 | €3,800€0 | €3,800€0 |
| Total revenue | €40,200 | €40,600 | €41,000 | €42,000 | €43,000 | €44,000 | €45,000 |
Simulate growth plan
Starting Nov 2026
New customers
Churn rate
Status quo
The question nobody costs out
Your analytics tool shows yesterday's MRR to two decimal places. What happens if your biggest client leaves — or one more point of churn runs for six months — is written down nowhere.
Today
- An MRR dashboard showing the past
- Losing a client is a gut feeling
- A revenue plan with no link to cash
- A new model for every scenario
With Foreqast
- Recurring revenue projected forward
- The cancellation as a scenario, impact visible instantly
- Calculated through to cash and runway
- Take the client out, compare with and without
How it works
From the loss to the runway that is left
Four steps, each powered by a feature.
Connect accounting and billing
Connect accounting plus your shop or billing system. Stripe delivers actual revenue and fees, accounting the cost side — both sync daily on their own.
Connected systems
DATEV
Accounting · bookings with account assignment
Shopify
Shop · orders, refunds, purchase costs
Stripe
Payments · payouts and fees
HubSpot
CRM · deals and pipeline
Enter the three inputs
New customers per day or month, churn rate and ARR per customer — set once, changeable from any month on. That's all the subscription model needs.
Simulate growth plan
Starting Nov 2026
New customers
Churn rate
The model calculates itself through
Active customers roll forward month by month and revenue follows them — a changed input lights up in the table, downstream effects included. Variable costs follow the resulting revenue automatically.
Subscription model
| Aug 26 | Sep 26 | Oct 26 | Nov 26 | Dec 26 | Jan 27 | Feb 27 |
| Revenue | |||||||
Subscription revenue | €36,400€36,400 | €36,800€36,800 | €37,200€0 | €38,200€0 | €39,200€0 | €40,200€0 | €41,200€0 |
New customers / moStripe | 6 | 6 | 6 | 9 | 9 | 9 | 9 |
Churn rateStripe | 2.1% | 2.1% | 2.1% | 2.1% | 2.1% | 2.1% | 2.1% |
ARR per customerStripe | €2,400 | €2,400 | €2,400 | €2,400 | €2,400 | €2,400 | €2,400 |
Active customers | 182 | 184 | 186 | 191 | 196 | 201 | 206 |
Onboarding & services | €3,800€3,800 | €3,800€3,800 | €3,800€0 | €3,800€0 | €3,800€0 | €3,800€0 | €3,800€0 |
| Total revenue | €40,200 | €40,600 | €41,000 | €42,000 | €43,000 | €44,000 | €45,000 |
Track revenue, burn and runway as one picture
Subscription revenue against total spend, with change in cash and cumulative cash as their own rows beneath — burn rate and runway date read straight off the table.
Cash flow
| Aug 26 | Sep 26 | Oct 26 | Nov 26 | Dec 26 | Jan 27 |
| Operating expenses | ||||||
Payroll | −€57,600−€57,600 | −€57,600−€57,600 | −€57,600€0 | −€57,600€0 | −€57,600€0 | −€57,600€0 |
| 6000 · Salaries | −€48,000 | −€48,000 | −€48,000 | −€48,000 | −€48,000 | −€48,000 |
| 6010 · Employer contributions | −€9,600 | −€9,600 | −€9,600 | −€9,600 | −€9,600 | −€9,600 |
Hosting & infrastructure | −€6,200−€6,200 | −€6,200−€6,200 | −€6,200€0 | −€6,200€0 | −€6,200€0 | −€6,200€0 |
Tools & software | −€2,400−€2,400 | −€2,400−€2,400 | −€2,400€0 | −€2,400€0 | −€2,400€0 | −€2,400€0 |
| Total operating expenses | −€66,200 | −€66,200 | −€66,200 | −€66,200 | −€66,200 | −€66,200 |
| Change in cash | −€28,400 | −€28,400 | −€28,400 | −€28,400 | −€28,400 | −€28,400 |
| Cumulative cash | €702,600 | €674,200 | €645,800 | €617,400 | €589,000 | €560,600 |
What you get
What is left after the cancellation
The three inputs on top, the revenue curve with and without the client beside them, and the runway that survives it underneath.
3
inputs
€448k
ARR in 6 months
19 mo
runway
Cash flow
| Aug 26 | Sep 26 | Oct 26 | Nov 26 | Dec 26 | Jan 27 |
| Operating expenses | ||||||
Payroll | −€57,600−€57,600 | −€57,600−€57,600 | −€57,600€0 | −€57,600€0 | −€57,600€0 | −€57,600€0 |
| 6000 · Salaries | −€48,000 | −€48,000 | −€48,000 | −€48,000 | −€48,000 | −€48,000 |
| 6010 · Employer contributions | −€9,600 | −€9,600 | −€9,600 | −€9,600 | −€9,600 | −€9,600 |
Hosting & infrastructure | −€6,200−€6,200 | −€6,200−€6,200 | −€6,200€0 | −€6,200€0 | −€6,200€0 | −€6,200€0 |
Tools & software | −€2,400−€2,400 | −€2,400−€2,400 | −€2,400€0 | −€2,400€0 | −€2,400€0 | −€2,400€0 |
| Total operating expenses | −€66,200 | −€66,200 | −€66,200 | −€66,200 | −€66,200 | −€66,200 |
| Change in cash | −€28,400 | −€28,400 | −€28,400 | −€28,400 | −€28,400 | −€28,400 |
| Cumulative cash | €702,600 | €674,200 | €645,800 | €617,400 | €589,000 | €560,600 |
What you need
Accounting and your billing system
Accounting delivers the actuals and billing the subscription reality — the plan you build from three inputs.
Browse all integrationsRequired
Optional
Related decisions
Keep exploring
“One point less churn — and we see immediately what it means for the runway.”
Co-founder, B2B SaaS
FAQ
Losing a client, answered
Which inputs do I need?
New customers per day or month, your churn rate, and ARR per customer. That's it.
How do I simulate losing one specific client?
As a decision in the simulator: take the subscription or the project contract out on a date and compare the forecast with and without it — revenue, margin and runway. Your plan stays untouched until you keep the change.
Are upgrades and downgrades included?
They flow in through ARR per customer; separate expansion modelling arrives with cohorts.
How does this connect to runway?
The resulting revenue feeds the day-by-day cash forecast that burn and runway are derived from.
Do I need Stripe?
No, but it helps: Stripe delivers actual revenue and fees for your plan to build on.
Cost the loss before it happens
Connect accounting and billing, take your biggest client out for a moment, and see what is left of revenue, margin and runway. Free to start.
14 days free · no card required