Bond Comparison Calculator
Compare South African home loan options side-by-side. See total cost difference, balance timelines, and model rate change scenarios to find the best bond for your situation.
Quick Calculator Get a fast estimate
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Better Deal
Offer 2
Offer 1 — Monthly Repayment
R 16 256
Offer 1 — Total Interest
R 2 401 345
Offer 1 — Total Repaid
R 3 901 345
Offer 2 — Monthly Repayment
R 15 739
Offer 2 — Total Interest
R 2 277 322
Offer 2 — Total Repaid
R 3 777 322
Monthly Payment Difference
R 517
Total Interest Savings
R 124 024
Offer 1 Rate / Term
11.75% / 20 yrs
Offer 2 Rate / Term
11.25% / 20 yrs
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How to Compare Bond Options
Don't just compare monthly payments — the total cost over the bond term is what matters. A lower rate or shorter term can save hundreds of thousands in interest. Key comparison points: monthly payment, total interest paid, total cost (principal + interest), and payoff timeline.
Need more detail?
Extended Calculator More options, charts, and scenario comparison
Bond A
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Bond B
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Monthly Payment Comparison
Bond A monthly
R 16 256
Bond B monthly
R 16 778
Monthly difference
R 523
| Bond A (11.75%) | Bond B (12.25%) | |
|---|---|---|
| Principal | R 1 500 000 | R 1 500 000 |
| Monthly Payment | R 16 256 | R 16 778 |
| Total Interest | R 2 401 345 | R 2 526 833 |
| Total Cost | R 3 901 345 | R 4 026 833 |
SA Bond Rate Factors (2025)
| Factor | Impact on Rate |
|---|---|
| Deposit (10%) | Prime + 1-2% |
| Deposit (20%+) | Prime + 0-1% |
| Good credit score (700+) | Up to -0.5% off rate |
| Salary customer of that bank | Up to -0.25% off rate |
| Loan above R3m | Often better rate |
Need full precision?
Professional Calculator Complete parameters, sensitivity analysis, and detailed breakdown
Bond A
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Bond B
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Bond C
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Full Cost Comparison
| Bond A | Bond B | Bond C | |
|---|---|---|---|
| Rate | 11.75% | 12.25% | 11.25% |
| Term | 20 yrs | 20 yrs | 25 yrs |
| Monthly Payment | R 16 256 | R 16 778 | R 14 974 |
| Initiation Fee | R 6 000 | R 5 000 | R 8 000 |
| Total Interest | R 2 401 345 | R 2 526 833 | R 2 992 078 |
| Total Cost (incl. fees) | R 3 907 345 | R 4 031 833 | R 4 500 078 |
Switching Cost Analysis
yrs
R
| Outstanding Balance | R 1 372 787 |
| Current Monthly Payment | R 16 256 |
| New Monthly Payment | R 15 819 |
| Remaining Cost (current bond) | R 2 926 009 |
| Remaining Cost (new bond + switching) | R 2 872 463 |
| Total Saving | R 53 546 |
| Break-even point | 58 months |
Frequently Asked Questions
The South African prime rate is currently approximately 11.75% (2025). Bond rates are typically prime + 0-2% depending on credit profile, deposit size, and LTV ratio. The SARB repo rate directly influences the prime rate and therefore all variable-rate home loans.
On a R1.5 million bond over 20 years, a 0.5% rate reduction saves approximately R87 per month and over R20,000 in total interest. The saving scales significantly with loan size and term length.
In a falling rate environment, variable-rate bonds benefit as rates drop. Fixed rates provide certainty but may be higher upfront. Switching has costs (legal, registration fees). Use the switching analysis to calculate whether the saving justifies the cost.