# Cash Flow Trough

> The faster a SaaS business grows, the worse its cash flow looks in the short term, because acquisition costs land before the recurring revenue does. The cash flow trough models this valley before you scale.

- Canonical URL: https://www.convios.com/en/methods/cash-flow-trough
- Language version: https://www.convios.com/de/methodik/cash-flow-trough
- Status: Externally proven
- Method library: https://www.convios.com/en/methods — Markdown: https://www.convios.com/en/methods.md

## Problem

You plan to raise the growth rate and expect your cash balance to carry it. In a subscription model, more growth initially deepens the capital need rather than covering it: every additional customer costs money today and pays back over months. Without a modeled trough you hit a liquidity gap mid-scale or lose your investors' confidence.

## Approach

1. Model the cash curve of a single customer: acquisition cost today, recurring contribution over the lifetime.
2. Aggregate these curves for the planned pace of new customers over several years.
3. Determine the depth and timing of the cash trough and the point where cash flow turns positive.
4. Check the trough against runway and financing capacity, including higher-pace scenarios.
5. Use the model actively in conversations with investors so the investment level is jointly supported.

## Example

A typical case: a software vendor with a working sales machine wants to raise its new-customer rate substantially. The simple planning logic of "more customers equals more cash" misses that each new customer only turns cumulatively positive after many months. The team models the trough for several growth scenarios and finds the most aggressive one overruns the runway. It picks a pace whose trough the existing financing can carry and lays out the capital need for the next stage.

## Limits

The model is only as good as the assumptions on churn, payback and sales productivity; young companies should work with ranges. It does not answer whether the growth is strategically right, only whether it is financeable. With highly variable deal sizes, cohort modeling is needed instead of an average customer.

## Metric

Maximum depth of the cumulative cash trough and the month cumulative cash flow turns positive, per growth scenario.

## Sources

- SaaS Economics · Part 1: The SaaS Cash Flow Trough, David Skok (forEntrepreneurs) — forEntrepreneurs, n.d. · practitioner source · describes the method. Names and quantifies the cash flow trough as a consequence of sales spending ahead of revenue, and shows both the depth of the trough and the months to recovery in a fully worked example. (https://www.forentrepreneurs.com/saas-economics-1/)
- SaaS Metrics 2.0 · A Guide to Measuring and Improving what Matters, David Skok (forEntrepreneurs) — forEntrepreneurs, n.d. · practitioner source · supports the underlying mechanism. Carries the core claim of the method, that a higher pace of customer acquisition deepens the trough and that accelerating growth comes with pressure on earnings and cash. (https://www.forentrepreneurs.com/saas-metrics-2/)
- Valuing Customers, Gupta, Lehmann & Stuart, Journal of Marketing Research — American Marketing Association / Columbia Business School (Volltext), 2004 · academic and scholarly literature · supports the underlying mechanism. Models customer value as a discounted stream of future earnings and treats acquisition spending as an upfront investment in that stream; it measures how strongly these levers move firm value (a 1 percent improvement in retention moves firm value roughly five times as much as a 1 percent improvement in margin). The claim that fast-growing companies therefore appear loss-making on paper is not made by this source. (https://business.columbia.edu/sites/default/files-efs/pubfiles/534/Valuing_Customers--JMR_2003.pdf)
- Primary source: SaaS Economics · Part 1: The SaaS Cash Flow Trough, David Skok (forEntrepreneurs) (https://www.forentrepreneurs.com/saas-economics-1/)

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