Comprehensive Guide
Learn more in our Personal Finance Guide.
How it works
A sabbatical runway is the amount of cash that lets you stop working for a defined period and land softly afterward — calculated here as essentials-per-month times the break length plus a deliberately separate re-entry cushion. The cushion is the part most planners skip: returning from six months off means job hunting, first paychecks that lag by weeks, and restart costs, so this tool adds two more months of essentials by default, bringing the true target to $20,800 rather than the naive $15,600. Pre-saving is solved with monthly compounding from your current dedicated fund and contribution rate — about twenty-two months at $750 a month on defaults, with interest chipping in along the way. The drawdown table then runs the break forward, withdrawing essentials each month until the fund drains toward zero exactly as you re-enter employment, which is the visual proof the plan is complete rather than hopeful. Budgeting essentials instead of full spending is what keeps the number humane: commutes, work lunches and payroll deductions pause, while health coverage often rises and deserves honest pricing. Recompute after any life change — rent moves, dependents arrive, or the break stretches from six months to nine, which multiplies everything.Formula
Runway = essentials × (break + cushion months) | Pre-save n = ln((runway + pmt/r) ÷ (saved + pmt/r)) ÷ ln(1+r), r = APY/12 | Drawdown = fund − essentials × month
Tips
- Budget essentials, not lifestyle — but price COBRA or marketplace health coverage honestly.
- Never skip the re-entry cushion; it converts a gamble back into a plan.
- Negotiate the return before leaving when possible — a guaranteed job shrinks the cushion needed.
- Keep the fund liquid in savings; a market dip right before departure can cancel the whole trip.
- Front-load saving before known expenses like leases ending — timing deposits beats raising them.