The original title is: "How to Actually Cap AI Spend for Your Users: 3 Edge Cases Everyone Misses"

Short summary

AI spend caps seem simple—just a meter and conditionals—but production systems face three critical decisions: should caps count included usage versus overage, should promo credits bypass the cap, and should independent limits reset on different schedules? This tutorial shows how to model these decisions as first-class features using Limitr, an open-source billing runtime.

• •Distinguish between total spend caps and overage-only caps to avoid customer confusion
• •Make promo credit accounting explicit—decide whether grant-covered usage counts toward caps
• •Support independent reset schedules for different caps on the same customer

Generated with AI, which can make mistakes.