Bond Repayment Calculator
Calculate your monthly bond repayment in South Africa. Get a quick estimate, compare scenarios (first home, refinance, extra payments), or run a full affordability and amortization analysis.
Quick Calculator Get a fast estimate
R
R
A 10% deposit is recommended; banks may require it.
%
yrs
Monthly Repayment
R 14 165
Loan Amount
R 1 350 000
Total Repayment
R 3 399 589
Total Interest Paid
R 2 049 589
Interest as % of Loan
151.82%
Deposit Percentage
10.00%
Term
240 months (20 years)
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How to Use the Bond Repayment Calculator
Enter the property price, your deposit, the annual interest rate (current SA prime = 11.25%), and the loan term. The calculator applies the standard PMT formula used by all South African banks to show your monthly repayment, total interest, and total cost.
The Extended Calculator below adds amortization charts and scenario tabs. The Professional Calculator includes a full amortization schedule, bank rate comparison, and affordability check.
Need more detail?
Extended Calculator More options, charts, and scenario comparison
R
R
%
Monthly Bond Repayment
R 14 165
Total Repayment
R 3 399 589
Total Interest
R 2 049 589
Outstanding Balance Over Time
Year-by-Year Breakdown
| Year | Interest | Principal | Balance |
|---|---|---|---|
| 1 | R 150 912 | R 19 068 | R 1 330 932 |
| 2 | R 148 652 | R 21 327 | R 1 309 605 |
| 3 | R 146 125 | R 23 854 | R 1 285 751 |
| 4 | R 143 299 | R 26 680 | R 1 259 071 |
| 5 | R 140 138 | R 29 842 | R 1 229 229 |
| 6 | R 136 602 | R 33 377 | R 1 195 852 |
| 7 | R 132 647 | R 37 332 | R 1 158 520 |
| 8 | R 128 224 | R 41 756 | R 1 116 764 |
| 9 | R 123 277 | R 46 703 | R 1 070 061 |
| 10 | R 117 743 | R 52 237 | R 1 017 824 |
| 11 | R 111 554 | R 58 426 | R 959 399 |
| 12 | R 104 631 | R 65 349 | R 894 050 |
| 13 | R 96 888 | R 73 091 | R 820 959 |
| 14 | R 88 228 | R 81 752 | R 739 207 |
| 15 | R 78 541 | R 91 438 | R 647 769 |
| 16 | R 67 707 | R 102 272 | R 545 496 |
| 17 | R 55 589 | R 114 390 | R 431 106 |
| 18 | R 42 036 | R 127 944 | R 303 162 |
| 19 | R 26 876 | R 143 103 | R 160 059 |
| 20 | R 9 920 | R 160 059 | R 0 |
Bond Repayment Formula
Monthly Payment = P × r(1+r)^n / ((1+r)^n − 1)
P = Principal (purchase price − deposit)
r = Monthly rate (annual rate ÷ 12)
n = Total months (years × 12)
SA Prime Rate History & Impact
| Rate | R1.5M Bond (20yr) | Monthly Cost vs Prime |
|---|---|---|
| 9.25% (prime −2%) | R13,632/mo | −R2,163 |
| 10.25% (prime −1%) | R14,622/mo | −R1,173 |
| 11.25% (prime) | R15,795/mo | — |
| 12.25% (prime +1%) | R16,855/mo | +R1,060 |
| 13.25% (prime +2%) | R17,984/mo | +R2,189 |
Extra Payments: The Power of Paying More
R1.5M bond at 11.25% over 20 years — paying R1,500 extra per month
Standard monthly: R15,795 | Total interest: R2,290,800
With extra R1,500/mo: Bond paid off in ~15 years 2 months
Interest saved: ~R572,000
Under the National Credit Act, you can make extra payments or settle early without any penalty.
Need full precision?
Professional Calculator Complete parameters, sensitivity analysis, and detailed breakdown
Bond Details
R
R
%
Prime = 11.25%
Monthly Ownership Costs
R
R
R
Affordability Check
R
R
Monthly Bond Repayment
R 18 887
Total Cost
R 4 532 786
Total Interest
R 2 732 786
All-in Monthly
R 21 187
DTI Ratio
45.2%
Affordability: Bond repayment (R 18 887/mo) is within 30% of income (R 24 000/mo). Likely approvable.
What-If: Monthly Payment vs Rate Change
SA Bank Rate Comparison
| Bank | Rate | Monthly | Total Interest |
|---|---|---|---|
| ABSA | prime | R 18 887 | R 2 732 786 |
| FNB | prime | R 18 887 | R 2 732 786 |
| Standard Bank | prime | R 18 887 | R 2 732 786 |
| Nedbank | prime | R 18 887 | R 2 732 786 |
| SA Home Loans | prime - 0.25% | R 18 579 | R 2 659 054 |
| Capitec | prime + 0.5% | R 19 507 | R 2 881 615 |
Full Amortization Schedule (every 12 months)
| Month | Interest | Principal | Balance |
|---|---|---|---|
| 12 | R 16 658 | R 2 229 | R 1 774 576 |
| 24 | R 16 393 | R 2 493 | R 1 746 140 |
| 36 | R 16 098 | R 2 789 | R 1 714 335 |
| 48 | R 15 768 | R 3 119 | R 1 678 761 |
| 60 | R 15 398 | R 3 489 | R 1 638 972 |
| 72 | R 14 985 | R 3 902 | R 1 594 469 |
| 84 | R 14 522 | R 4 364 | R 1 544 693 |
| 96 | R 14 005 | R 4 881 | R 1 489 019 |
| 108 | R 13 427 | R 5 460 | R 1 426 748 |
| 120 | R 12 780 | R 6 107 | R 1 357 099 |
| 132 | R 12 057 | R 6 830 | R 1 279 198 |
| 144 | R 11 247 | R 7 639 | R 1 192 067 |
| 156 | R 10 342 | R 8 545 | R 1 094 611 |
| 168 | R 9 330 | R 9 557 | R 985 609 |
| 180 | R 8 197 | R 10 689 | R 863 692 |
| 192 | R 6 931 | R 11 956 | R 727 328 |
| 204 | R 5 514 | R 13 372 | R 574 808 |
| 216 | R 3 930 | R 14 957 | R 404 216 |
| 228 | R 2 158 | R 16 729 | R 213 412 |
| 240 | R 175 | R 18 711 | R 0 |
Frequently Asked Questions
Bond repayments use the PMT formula: M = P × r(1+r)^n / ((1+r)^n − 1). P is the loan amount (price minus deposit), r is the monthly interest rate (annual rate ÷ 12), and n is the total number of monthly payments. All South African banks use this formula.
The prime rate is the SARB repo rate plus 3.5%. As of early 2026, the prime rate is approximately 11.25%. Banks may add a risk margin for higher-risk borrowers, or offer discounts (prime minus) for low-risk borrowers with large deposits.
Banks typically require 10–20% deposit. Some banks offer 100% bonds for qualifying first-time buyers or those with excellent credit. A 20% deposit on a R2M property saves approximately R380,000 in interest over 20 years at 11.25%.
Yes. The National Credit Act guarantees your right to settle a bond early without penalty. Making extra payments into your bond reduces your principal faster. Even R500–R1,000 extra per month can save years off your term and tens of thousands in interest.
South African banks typically approve home loans where the monthly bond repayment does not exceed 30% of gross monthly income. Total debt obligations (bond + car + other loans) should ideally stay below 40–45% of income (debt-to-income ratio).