Strategy
Build vs Buy: Should You Build Your Own Usage Billing System?
By the Orvlin team · · 7 min read
What building really involves
- Event ingestion at scale with deduplication.
- A rating engine for tiers, credits and commitments.
- Invoice generation, adjustments and credit notes.
- Revenue reporting and audit trails.
- Ongoing maintenance for every pricing change.
Hidden costs
The biggest cost is opportunity: engineers maintaining billing aren't building the product. The second is risk — billing errors erode customer trust and create revenue leakage.
When building makes sense
Only when pricing is so unusual that no platform can model it, and you have a dedicated team to own it long-term.
A decision checklist
If you plan to change pricing more than once a year, sell custom contracts, or bill on more than one metric, buying is almost always cheaper.
Frequently asked questions
- How long does it take to build usage billing?
- A basic version often takes a few months; a production-grade system with finance controls is an ongoing investment.