How much does it cost to fix a Shopify checkout bug?
Most single, well-defined checkout bugs are a flat $99 Quick Fix (about 4 hours at $25/hr), turned around in 24-48 hours. A batch of issues, or one stubborn root-cause like a full checkout.liquid → Checkout Extensibility migration, is a $499 Bug-Fix Sprint (~20h @ $25/hr). If checkout is down right now or you need standing peak-season cover, the Emergency / Retainer tier is custom-quoted. You always get the fixed price before any work starts.