Useful next calculations
When to use this calculator
- Before choosing between saving, investing or changing a contribution.
- When you want to compare cautious, base and optimistic return assumptions.
- When you need a projection before making a longer-term decision.
- When you want to see whether starting earlier or contributing more changes the outcome more.
A worked example
These are the example figures the calculator opens with.
| Input | Value |
|---|---|
| Initial Deposit (R) | R5 000 |
| Monthly Contribution (R) | R200 |
| Annual Interest Rate (%) | 4,5% |
| Years | 10 |
For those figures the calculator returns:
- Final value: R38 074,58
- Total deposited: R29 000,00
- Interest: R9 074,58
Common mistakes
- Using an assumption that is not supported by a current local quote, bill, statement or official source.
- Treating a generic estimate as a lender, provider, payroll or tax authority decision.
- Mixing monthly and annual inputs without converting them consistently.
- Testing only one scenario instead of checking how a cautious assumption changes the result.
What to do next
- Run a second scenario with a cautious assumption so you can see the downside clearly.
- Compare the result with the related calculators below before making a decision.
- Check current local rules, eligibility and provider terms before applying or committing money.
- Keep a record of the assumptions so you can update the estimate when a quote, bill or pay figure changes.
Questions people ask
Fixed rate bonds typically pay 0.3-1.5% more than easy access, but lock in funds for 1-5 years with penalties for early withdrawal. They suit known future spending or part of a laddered strategy. Easy access wins for emergency reserves where liquidity matters.