Recurring Revenue Analysis in Financial Due Diligence
How FDD analysts assess recurring revenue quality, contract terms and revenue sustainability. Key metrics and red flags to know for TS interviews.
Recurring revenue is the most valuable type of revenue in any business from an M&A perspective. It is visible, predictable and commands premium valuation multiples. For FDD analysts, the key task is not simply confirming the revenue label — it is rigorously testing whether the recurring revenue is genuinely sticky, defensible and sustainable.
What Counts as Recurring Revenue?
Recurring revenue exists when customers pay on a predictable, repeating basis. Common structures include:
- Annual Recurring Revenue (ARR): Software-as-a-Service (SaaS) subscriptions billed annually or monthly
- Maintenance contracts: Annual service agreements in industrial or technology businesses
- Retainer fees: Professional services firms with long-term client retainers
- Contracted supply agreements: Multi-year supply contracts with minimum volumes
- Licence fees: Annual licence renewals for software or intellectual property
Not all of these are equally "recurring" — quality varies widely.
The FDD Analyst's Framework for Recurring Revenue
Step 1: Define "Recurring" for This Business
Management will often label revenue as recurring. The first task is to apply your own definition:
- Is the revenue contractually committed or just historically repeating?
- What is the notice period for cancellation?
- What is the churn rate (percentage of customers lost per period)?
Step 2: Build a Revenue Bridge by Category
Separate recurring from non-recurring revenue and trace each category year-over-year:
- New customer ARR added each year
- Churned ARR lost each year
- Expansion ARR (upsell to existing customers)
- One-off project revenue
This analysis reveals whether the business is genuinely growing its recurring base or papering over churn with new sales.
Step 3: Assess Churn and Retention
- Gross revenue retention: What percentage of prior-year ARR is still active this year?
- Net revenue retention: Does expansion revenue more than offset churn?
- Logo retention: What percentage of customers renew (regardless of contract value)?
For high-quality SaaS businesses, gross retention above 90% and net retention above 100% are typical benchmarks.
Step 4: Review Contract Terms
Read a sample of contracts to understand:
- Contract length and renewal terms
- Notice periods
- Price escalation clauses
- Exclusivity provisions
- Most-favoured-nation clauses
Step 5: Test the Sustainability of Revenue
Look for factors that could threaten recurring revenue post-acquisition:
- Key customers with contracts ending soon
- Dependency on a platform or partner that could terminate the relationship
- Technological disruption risk
- Price sensitivity or competitive alternatives
Impact on Valuation
High-quality recurring revenue justifies higher valuation multiples. A business with 80% ARR and 95% gross retention may trade at 12–15x EBITDA. A similar-sized business with 40% recurring revenue may trade at 6–8x.
FDD analysts who can clearly articulate the quality of recurring revenue help buyers make better-informed valuation decisions.
Conclusion
Recurring revenue analysis is a technical skill at the intersection of FDD, commercial due diligence and contract review. It is particularly important in software, services and subscription business M&A.
The Transaction Services Interview Programme (€119.99, one-time) includes a dedicated FDD case study on a software business with full recurring revenue analysis. Get access now.