=== Testing Exact ESS Loan Topup Calculation (No Payoff Factor) ===

Testing Loan: URL013572
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Original Principal: 6,397,076.00
Total Tenure: 36 months
Installments Paid: 5
Effective Principal Factor: 0.6695
Effective Principal: 4,282,842.38

Calculated Payoff: 3,775,683.99
Expected Payoff: 3,774,876.79
✗ ERROR: Difference of 807.20

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Testing Loan: TEST002
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Original Principal: 5,000,000.00
Total Tenure: 36 months
Installments Paid: 10
Effective Principal Factor: 0.6695
Effective Principal: 3,347,500.00

Calculated Payoff: 2,534,482.49

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Testing Loan: TEST003
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Original Principal: 3,000,000.00
Total Tenure: 24 months
Installments Paid: 5
Effective Principal Factor: 0.6695
Effective Principal: 2,008,500.00

Calculated Payoff: 1,628,668.61

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DETAILED CALCULATION FOR URL013572:
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Step 1: Convert original principal to effective principal
  Original: 6,397,076.00
  Factor: 0.6695
  Effective: 4,282,842.38

Step 2: Calculate interest factors
  Annual Rate: 12%
  Monthly Rate: 1.0000%
  (1 + r)^n = 1.4307687835916
  (1 + r)^m = 1.0510100501

Step 3: Apply reducing balance formula
  Numerator: (1+r)^n - (1+r)^m = 0.379759
  Denominator: (1+r)^n - 1 = 0.430769
  Ratio: 0.881584

Step 4: Calculate final payoff
  Payoff = Effective Principal × Ratio
  Payoff = 4,282,842.38 × 0.881584
  Payoff = 3,775,683.99

RESULT: The exact payoff amount is 3,775,683.99
Expected: 3,774,876.79

Difference: 807.20