How much does it cost to fix a Magento checkout bug?

One well-defined checkout bug starts at $99 (~4h @ $25/hr), reproduced on staging, root-caused, fixed, and verified with a real test order. A batch of bugs or one deep root cause behind several symptoms is the $499 Bug-Fix Sprint (~20h @ $25/hr). If checkout is down and you need 24/7 cover, that’s a custom retainer that can include a $2,499 stabilization sprint (~100h @ $25/hr). You get a fixed price before any work starts, no per-hour surprises.