Pay-As-You-Go Pricing
B2B SaaS Pricing Glossary
Pay-As-You-Go Pricing: Pay-as-you-go pricing is a consumption model where customers are billed only for what they actually use, with no upfront commitment or minimum spend. Usage is metered in real time and invoiced in arrears, making it the lowest-commitment form of usage-based pricing.
Definition
Pay-as-you-go pricing removes the subscription entirely — customers have no monthly or annual fee and simply pay for consumption after the fact. AWS popularized this model for cloud infrastructure, and it has spread to API-first products, communication platforms (Twilio), and increasingly AI services.
The benefit for buyers is zero waste — they only pay for what they use. The risk for vendors is revenue unpredictability. A customer's bill can fluctuate wildly month to month, making forecasting difficult. There is also a psychological challenge: customers with variable bills often feel less committed to the product, making them easier to churn. For this reason, most mature SaaS companies offer pay-as-you-go as one option alongside committed plans that offer discounts in exchange for predictable spend.
Why It Matters for B2B SaaS
Pay-as-you-go pricing reduces the barrier to adoption to near zero, making it a powerful acquisition tool for developer and technical buyer segments. However, companies that rely solely on PAYG often see 15-20% lower net revenue retention compared to those that convert customers to committed plans. The most successful approach is using PAYG to land customers, then incentivizing committed spend through volume discounts.
FAQs
What is the difference between pay-as-you-go and usage-based pricing?+
Pay-as-you-go is a specific type of usage-based pricing with no minimum commitment. Usage-based pricing is the broader category that also includes committed usage plans (buy a block of usage upfront at a discount), usage tiers (different rates at different volume levels), and hybrid models with a base subscription plus usage overages.
How do SaaS companies forecast revenue with pay-as-you-go pricing?+
Forecasting requires cohort analysis — tracking usage patterns by customer vintage, segment, and size to predict future consumption. Many companies use trailing 3-month usage averages as the baseline forecast, adjusted for growth trends. Converting PAYG customers to committed plans through discounts significantly improves forecast accuracy.
Deep Dives on Pay-As-You-Go Pricing
Choosing the right pricing model starts with customer research.
The PACE System uses deep customer research to determine which pricing model — usage-based, tiered, hybrid, or something else — will maximize revenue for your specific product and market.
Learn About the PACE System