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Rework calculator

Put a number on the rework tax

Estimate the cost of late engineering judgment at your PR volume, then model the value of moving validation before the PR. Defaults come from the Baz rework distribution, measured across 59,860 PRs from May to July 2026. Hover the ? markers for what each input means.

Pull requests your organization merges in a typical month, across all repositories. Use the presets for a quick starting point.your org
The fully loaded hourly cost of an engineer: salary, benefits, and overhead, not just base pay. $150/hr roughly matches a $220K fully loaded annual cost.fully loaded $/hr
The share of PRs that receive at least one new commit after review starts: each one is a correction loop paid for after the code exists. The Baz platform baseline is 50.2%.50.2%

PRs with a post-review commit

The share of PRs that accumulate 7 or more commits after review. Few in number, they consume an outsized share of review capacity. The Baz platform baseline is 8.6%.8.6%

PRs with 7+ commits after review

Human reviewer attention spent on each review pass beyond the first. The model prices only these repeat passes; the first review of every PR is normal cost, not rework.8 min

reviewer minutes per extra review pass

Reworked PRs wait far longer to merge, but most of that delay is idle time. This is the share you count as paid engineering effort: context switching, rebasing, re-testing.5%

share of merge delay counted as active work

The share of downstream rework Planner shifts upstream by validating intent, boundaries, and risk before the code is written. Tune it to how much of your rework is plan-shaped.35%

downstream rework shifted upstream

Estimated rework taxExtra review passes priced in reviewer hours, plus the active share of blocked cycle time, both at your fully loaded hourly cost.$255K/moreview labor + active blocked-cycle cost
Planner valueThe rework tax multiplied by Planner impact: the monthly spend the model expects Planner to recover by moving validation before the PR.$89.2K/momodeled monthly recovery

Model note: defaults use the Baz rework distribution measured across 59,860 PRs, May to July 2026. Cost assumptions are adjustable; tune them to your team.

WorkloadHow review capacity splits across rework tiers at your inputs: the share of all review passes each tier consumes, from clean PRs to heavy correction loops.2,500 PRs, 50.2% rework
Clean17.6%
Light24.6%
Moderate20.6%
Heavy37.2%
Cycle timeMedian hours from open to merge for each tier in the Baz baseline. Rework compounds waiting time, not just review time: heavy PRs take days, not hours.median hours to merge
Clean0.4h
Light2.6h
Moderate19.6h
Heavy66.1h

Shift left, before the PR. Planner validates intent, boundaries, and risk before the code is composed.

Structural constant

One in two PRs enters a post-review correction loop at the Baz platform baseline.

Cost concentration

Heavy rework is a small share of PRs, but it consumes a disproportionate share of review capacity.

Planner thesis

Move judgment earlier so teams eliminate risky paths before code is authored.

Run it against your real numbers

A model is a starting point. Bring your PR volume and we will measure your actual rework distribution, price it, and show what Planner recovers.

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