What should a B2B SaaS company do when growth slows? Find the leak before you spend
Split the slowdown into its parts before choosing a fix. Annual recurring revenue growth is new business plus expansion minus churn, and new business is pipeline times conversion. Find which part moved, then act on that part. In the example below, growth fell from 32% to 17%, and marketing influenced only one of the three drops. Adding ad spend would have been the wrong response to a retention problem.
Key takeaways
Start by splitting growth into its parts
Net new annual recurring revenue is new business plus expansion minus churn. New business equals qualified pipeline times win rate times average deal size. Any slowdown sits in one or more of those pieces.
The table uses assumed numbers. Net new revenue fell by $0.9M in year two, and the drivers are visible once you split it.
| $M, assumed | Year 1 | Year 2 | Change |
|---|---|---|---|
| Starting ARR | 10.0 | 13.2 | |
| New business | 3.0 | 2.6 | -0.4 |
| Expansion | 1.0 | 0.7 | -0.3 |
| Churn | -0.8 | -1.0 | -0.2 |
| Net new ARR | 3.2 | 2.3 | -0.9 |
| Ending ARR | 13.2 | 15.5 | |
| ARR growth | 32% | 17% | -15 points |
New business explains $0.4M of the $0.9M drop. Expansion and churn explain the other $0.5M. Marketing spend would only address the first part.
Four leaks and how to tell them apart
| Leak | Signal in the data | Who owns the fix | First move |
|---|---|---|---|
| Less new pipeline | Qualified opportunities created per month fell; cost per opportunity rose | Marketing and sales development | Channel and ICP review, marginal dollar test |
| Lower conversion | Win rate or stage conversion fell with similar pipeline | Sales leadership, product marketing | Loss reasons, competitor review, deal reviews |
| Weaker expansion | Net revenue retention fell; fewer upsells and seat growth | Customer success, product | Account health review, expansion plays |
| Higher churn | Gross revenue retention fell; churn concentrated in a segment or cohort | Customer success, product, marketing for fit | Cohort analysis, ICP tightening |
Our churn, gross revenue retention and net revenue retention guide shows how to calculate the retention rows from your own billing data.
If the leak is new pipeline
Check qualified opportunities created per month by source, then cost per opportunity. Rising cost with falling volume points to saturation or targeting drift, which the marginal dollar test is built for.
If volume is flat but pipeline coverage against the target is short, the pipeline coverage math for 2027 gives you the numbers to size the gap before you decide how to close it.
Bring your 2027 target. In 30 minutes we map the pipeline gap, the first 90 days and what to fix before January.
If the leak is conversion
When pipeline is steady and wins are not, the problem is downstream of marketing. Pull loss reasons from the last two quarters, review five lost and five won deals for the buying group involved and look for one pattern, such as a competitor, a missing stakeholder or a missing proof point.
Marketing can help with the findings, for example by building the proof or the comparison page the buying group asked for, but it cannot fix it with more leads.
If the leak is expansion or churn
Segment churn by the customer’s size, industry, source and onboarding path. When churn clusters in one segment, the cause is often acquisition: a campaign that brought in customers who were never a good fit. In that case, tightening the ideal customer profile and the offer is a marketing job with a retention payoff.
Where churn is spread across segments, the cause sits with product or support, and a marketing budget increase will not touch it.
What to avoid
- Adding spend before the split. It hides the real leak for a quarter.
- Judging only by the blended growth rate. It averages four different problems.
- Reviewing marketing alone. Expansion and churn are shared between customer success, product and sales.
- Changing several things at once. Fix the biggest leak, then re-read the numbers.
How PlanConversion handles this
We start with the split above using your CRM and billing data, then agree which leak to fix first and what success looks like, before any budget moves.
Where the leak is new pipeline, our paid media and ABM services take it on. Where it sits in retention or conversion, we say so and point to the owner.
Frequently asked questions
What should a B2B SaaS company do when growth slows?
Split growth into new business, expansion and churn, and split new business into pipeline and conversion. Find which part moved, fix that, and avoid adding spend until you know the cause.
Is a growth slowdown always a marketing problem?
No. Marketing owns pipeline and part of conversion. Expansion and churn sit with customer success and product, and a loss of fit in acquisition can show up there too.
How do I know whether to spend more or less?
If the leak is new pipeline and the marginal cost of the next opportunity is within your limit, spend more. If cost per opportunity rises with each increment, hold or cut and fix targeting first.
How often should I run this review?
Quarterly for the full split, monthly for pipeline and cost per opportunity.
We run enterprise B2B demand generation for teams in Montreal, Toronto, Ottawa and the United States.
