What should you do with $1 million?
Compare investing, debt repayment, and liquidity with the same household cash-flow budget. Enter your own assumptions. This is a scenario tool—not a return forecast or investment recommendation.
What changes across choices?
Results show after-tax projected incremental net worth, including remaining debt. These are deterministic illustrations, not probabilities.
| Metric | Invest | Debt payoff | Half payoff | Custom |
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10-year comparison
Calculated at the entered horizon
Results include modeled cash interest taxes and terminal capital-gains taxes. A lender may not permit recasting after a partial principal payment.
Downside scenario
The same strategies are also tested against a negative first-year market return followed by the assumed investment growth rate.
| Measure | Invest | Debt payoff | Half payoff | Custom |
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Important modeling assumptions and limitations
FundSpective Capital Decision Lab is a private calculation prototype. No bank accounts or investments are connected. Do not use this prototype alone to make an irreversible financial decision.