Burnout Monitor
Cognitive output drops sharply below 6 hours; 4h sleep = 60% capacity.
When staying up later to work actually costs more tomorrow than it earns tonight.
Research consistently shows sub-7-hour sleep degrades reaction time, working memory, and error rates. That degradation has a dollar value if you're paid by output.
Part of: Saving & Spending Calculators
Quick answer
When staying up later to work actually costs more tomorrow than it earns tonight.
Key points
- ▸ Multipliers: 8h = 100%, 7h = 95%, 6h = 85%, 5h = 72%, 4h = 60%, 3h = 48%, <3h = 35%.
- ▸ Gross tonight = extra hours × rate.
- ▸ Tomorrow loss = extra hours × rate × (1 − multiplier).
- ▸ Net = gross − tomorrow loss. Below zero, stay up is loss.
Examples
- 5h sleep, 3 extra hrs, $30/hrCognitive 72%. Gross $90, loss $25. Net +$65 (marginal).
- 4h sleep, 4 extra hrs, $40/hrCognitive 60%. Gross $160, loss $64. Net +$96 but every mistake costs more.
When to use which tool
- Burnout MonitorMain tool — cognitive fog overlay.Estimate when extra work hours stop being worth the fatigue cost from lost sleep.
- Minimum Viable RateFor salary-equivalent rate floors.The absolute minimum hourly rate to match a corporate salary after self-employment tax, benefits, and non-billable time.
- Revenue per HeadIf the question is whether to hire instead.Estimate whether the next hire raises or lowers revenue per employee after management time and ramp-up.
Related
- Burnout MonitorEstimate when extra work hours stop being worth the fatigue cost from lost sleep.
- Minimum Viable RateThe absolute minimum hourly rate to match a corporate salary after self-employment tax, benefits, and non-billable time.
- Gig Net FloorWhat DoorDash or Uber actually pays after IRS mileage depreciation — real hourly vs the minimum wage floor.
Frequently asked questions
› Are the multipliers scientifically exact?
Directional. Real-world variation is large; calibrate from personal experience.
› What about caffeine?
Delays symptoms, does not restore cognitive ceiling. The numbers still apply.
› How should I use this guide with a Kefiw tool? How-to
Use the guide as the plan and the linked Kefiw tool as the check. Read the steps first, try the move manually, then use the tool to compare outputs, catch edge cases, and decide whether the result actually fits your task.
› What mistake do tool guides help avoid? Troubleshooting
Tool guides help avoid using a utility mechanically without understanding what you are trying to accomplish. Most word, writing, and text utilities are fast, but speed can hide context mistakes. Know whether you are solving a puzzle, cleaning copy, drafting a line, or checking a rule.
› Can a tool guide help me learn the skill? How-to
A tool guide can help you learn if you pause before accepting the output and ask why it worked. Compare your first guess with the tool result, look for the rule or pattern, and repeat that review. Passive copying solves one task; active review builds the skill.