Which use of a spare dollar wins.
A worked example
Starting figures
- Spare cash
- $10,000
- Debt interest rate
- 7.5%
- Investment return
- 7%
- Tax on returns
- 15%
- Years
- 5
What it returns
- Repay the debt
- $1,006 better
- Investing nets
- $3,351
- Repaying saves
- $4,356
- After-tax return
- 5.95%
How to read the results
With the defaults above, repay the debt works out at $1,006 better.