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Methodology

Sabbatical Cost methodology

Estimate a sabbatical cost against user-entered savings and support.
Duc Nguyen X.By Duc Nguyen X.· Founder, Wage101Last reviewed: View update historyMethodology

Educational only: Work and pay decision support, not tax, legal, financial or career advice.

Privacy: Calculations run locally; Wage101 does not receive your work or pay inputs.

Update policy: Reviewed when formulas or official dependencies change.

Scope: Market-neutral work and pay planning using your own assumptions.

1. Formulas and units

Net sabbatical cost
netCost = monthlyForegonePay × months + monthlyContinuationCosts × months + oneTimeCosts − monthlyWorkCostSavings × months − paidSupport

Where

months
Sabbatical months (months)Source: User assumption
monthlyForegonePay
Monthly foregone pay (currency units/month)Source: User assumption
monthlyContinuationCosts
Monthly continuation costs (currency units/month)Source: User assumption
oneTimeCosts
One-time costs (currency units)Source: User assumption
monthlyWorkCostSavings
Monthly work-cost savings (currency units/month)Source: User assumption
paidSupport
Paid support (currency units)Source: User assumption
netCost
Net sabbatical cost (currency units)Source: Calculated output
Savings buffer remaining
bufferRemaining = savingsBuffer − netCost

Where

savingsBuffer
Savings buffer (currency units)Source: User assumption
bufferRemaining
Savings buffer remaining (currency units)Source: Calculated output
Gross sabbatical cost
grossCost = monthlyForegonePay × months + monthlyContinuationCosts × months + oneTimeCosts

Where

months
Sabbatical months (months)Source: User assumption
monthlyForegonePay
Monthly foregone pay (currency units/month)Source: User assumption
monthlyContinuationCosts
Monthly continuation costs (currency units/month)Source: User assumption
oneTimeCosts
One-time costs (currency units)Source: User assumption
grossCost
Gross sabbatical cost (currency units)Source: Calculated output

Money inputs and outputs use the currency selected in the scenario without changing the canonical methodology. Pay, time, benefits and work-related costs use the units stated beside each input.

2. Worked example

Input assumptions

Six months at 5,000 foregone pay, 1,000 continuation cost, 2,000 one-time cost and 500 monthly savings.

Calculation and outputs

Example

Six months at 5,000 foregone pay, 1,000 continuation cost, 2,000 one-time cost and 500 monthly savings.

Net sabbatical cost
35,000.00 currency units
Savings buffer remaining
15,000.00 currency units
Gross sabbatical cost
38,000.00 currency units

The engine returns a 35,000 net sabbatical cost.

Interpretation

Use net cost and remaining buffer together to assess the entered leave horizon.

3. Validation and boundary checks

  • The worked example is calculated through the same shared-work-logic engine as the planner.
  • Non-finite and out-of-range assumptions return an input error.
  • Result cards, trace, CSV, PDF and methodology bind to named engine result fields.

4. Assumptions and source classification

  • Monthly amounts remain constant through the entered horizon.
  • Savings buffer earns no assumed return.

This calculator has no current policy-data dependency. Its work and pay assumptions are user supplied. Registered family-level regression suites exercise the shared work-logic engine and worked-result reconciliation.

5. Limitations

  • No leave entitlement, tax, investment return or inflation is inferred.
  • Career and wellbeing outcomes are not monetized.

This is educational decision support, not personalised tax, legal, financial or career advice. Check the treatment of your circumstances under the rules that apply to you and seek qualified advice where appropriate.

6. Update and evidence policy

Registered family-level suites test formula invariants and example reconciliation; the release ledger records that coverage without claiming a separate oracle for every line of public copy. There is no official threshold or benchmark to refresh for this calculator. Work and pay inputs remain user-supplied because they vary by person, job and contract.

Change history

  1. : Initial public release of the Sabbatical Cost planner and methodology.

Related reading

Use these practical guides to interpret the decision and its assumptions.

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