Compare the financial assumptions behind a real training option. The prefilled numbers are a fictional worked example, not a school quote or a salary forecast. Replace them with your evidence. Use gross earnings consistently. This is a simplified economic comparison, not a monthly household cash-flow plan.
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Compare up to three scenarios
Save a base case, lower-pay case and higher-cost case. Compare the assumptions and missing evidence, rather than treating the shortest payback as a recommendation.
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The formula, line by line
- Net direct cost = max(0, tuition + fees + tools + other one-time costs − grants).
- Training-period cost = months × (gross earnings forgone + extra monthly expenses).
- Comparison investment = net direct cost + training-period cost.
- Monthly incremental gain = (annual gross earnings after training − alternative annual gross earnings) ÷ 12 − extra monthly work costs.
- Payback after training = investment ÷ positive monthly gain. Time from enrollment adds the training months.
Check the fictional example yourself
The starting direct cost is $12,000 + $1,000 + $1,000 + $0 − $2,000 = $12,000. Twelve months of $750 forgone earnings and $200 extra costs add $11,400, for a total of $23,400. The monthly gain is ($56,000 − $32,000) ÷ 12 − $100 = $1,900. Payback is about 12.3 months after training, or 24.3 months from enrollment.
If the after-training annual pay in that same fictional scenario is $38,000, the monthly gain is only $400 and payback rises to 58.5 months after training. If it is $33,200 or less, extra work costs consume the pay difference and the tool reports no positive payback. These are arithmetic sensitivity examples, not labor-market forecasts.
When this model is not enough
It assumes immediate paid work after training and a constant earnings difference. It does not model taxes, interest, repayment schedules, completion probability, wage progression, unemployment or a job-search delay. Ordinary living costs unchanged between routes cancel in this comparison but still need a household budget. A loan finances costs; it is not a grant and its principal must not be charged twice. If grants exceed direct costs, direct cost is floored at zero; the model does not apply a surplus to living costs.