What is SaaS Metered Billing?

With a traditional subscription, there is a flat monthly fee (say $50/month) regardless of how much a customer uses a service. With SaaS metered billing, there is a count of “usage events” and possible pricing tiers. Those usage events are recorded and form the basis of determining the bill at the end of the billing cycle.

These events can be recorded and include the following measurable units: API calls made, storage used, emails sent, and minutes spent actively using the platform.

A common challenge for SaaS businesses is the “Event Ingestion” process. You need a reliable way to record every time a customer performs a billable action without causing latency in your application.

Since in metered billing, the final invoice is calculated at the end of the billing period, and the full amount appears at that time, customers may have questions about how their usage translates into charges. This pattern is commonly referred to as “bill shock” and is a factor that relates to churn rates and billing inquiries.

To manage this process, SaaS companies can use the following measures:

• Real-time Usage Dashboards: This dashboard displays usage data during the billing period.
• Threshold Alerts: Automated emails sent when a customer reaches 50%, 80%, or 100% of their typical usage.
• The Merchant of Record Advantage: An MoR handles localized customer support for metered invoices and chargeback requests.

With flat-rate subscriptions, payment is typically collected before service access begins (pre-paid). In metered billing, charges are commonly calculated in arrears (post-paid). 

This means usage is recorded first, and payment occurs later in the billing cycle, so a SaaS company accepts some risk – you have already paid for the server resources the customer consumed.

Many investors look for consistency in recurring revenue metrics. Metered billing can cause Monthly Recurring Revenue (MRR) to vary from one period to another. 

To account for this, SaaS finance teams often use Committed Monthly Recurring Revenue(CMRR), which includes the base fee and expected usage based on historical averages.

Absolutely. Tiered Metered Billing is commonly used in infrastructure and developer tools.  

• Tier 1: 0–500 units ($0.00) – The “Hook”
• Tier 2: 501–5,000 units ($0.10/unit) – The “Growth”
• Tier 3: 5,001+ units ($0.05/unit) – The “Enterprise”