SaaS Revenue Forecasting Template: How to Predict Growth with Confidence
Forecasting revenue accurately is one of the most important — and most challenging — tasks for any SaaS company. Subscription-based business models bring predictable income streams, but they also depend heavily on metrics like churn, customer acquisition, and expansion revenue. A well-structured SaaS revenue forecasting template helps founders, finance teams, and investors make data-driven decisions and plan sustainable growth. SaaS revenue forecasting template
Why Revenue Forecasting Matters in SaaSUnlike one-time sales businesses, SaaS companies rely on recurring revenue from subscriptions. This means understanding future revenue involves more than just adding up new deals — you must account for renewals, upgrades, downgrades, and cancellations.
Accurate forecasting allows you to:
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Plan hiring and operational expenses confidently 
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Set realistic growth targets 
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Manage investor expectations 
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Identify when to adjust pricing or customer acquisition strategy 
Before diving into the template, it’s essential to define the core metrics driving your forecast:
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MRR (Monthly Recurring Revenue) – The predictable monthly income from active subscriptions. 
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ARR (Annual Recurring Revenue) – MRR × 12, often used for investor reporting. 
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New MRR – Revenue added from new customers. 
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Expansion MRR – Revenue gained from existing customers upgrading or adding seats. 
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Churned MRR – Revenue lost from cancellations or downgrades. 
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Net New MRR – (New MRR + Expansion MRR) – Churned MRR. 
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Customer Churn Rate – The percentage of customers lost in a given period. 
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Customer Acquisition Cost (CAC) – The average cost to acquire one new customer. 
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Customer Lifetime Value (LTV) – The total expected revenue from a customer during their subscription lifespan. 
A strong forecasting template breaks your revenue projections down by month and by customer segment. The following structure works well for most SaaS businesses:
Month
Starting MRR
New MRR
Expansion MRR
Churned MRR
Ending MRR
Growth %
Jan
$50,000
$10,000
$2,000
$3,000
$59,000
18%
Feb
$59,000
$12,000
$3,000
$4,000
$70,000
19%
...
...
...
...
...
...
...
You can expand this template to include:
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Number of new customers each month 
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Average Revenue Per Account (ARPA) 
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CAC payback period 
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Cohort analysis to track retention by signup month 
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Start with Historical Data 
 Use at least 6–12 months of MRR and churn data to establish baselines.
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Model Different Growth Scenarios 
 Create conservative, moderate, and aggressive projections to see how assumptions impact results.
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Include Seasonality or Market Changes 
 Factor in known events like renewals, product launches, or pricing changes.
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Incorporate Expansion Revenue 
 Many SaaS businesses grow via upselling existing customers — model this realistically.
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Review and Update Monthly 
 Forecasts should evolve with real performance data.
You can build your forecasting model in:
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Google Sheets or Excel – Flexible and easy to customize 
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Financial modeling tools like Causal, Fathom, or LiveFlow for automation 
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SaaS analytics platforms such as ChartMogul, Baremetrics, or ProfitWell for real-time data feeds 
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