Calculation methods
Partial and whole balance methods
Understand how whole-balance and partial-balance tiers change an interest calculation.
Tiering determines whether one rate applies to the full balance or different rates apply to portions of it. Flinq supports whole-balance and partial-balance methods for interest and payout profiles.
Example tiers
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GBP 0 up to, but not including, GBP 1,000,000: 1.00%
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GBP 1,000,000 up to, but not including, GBP 5,000,000: 1.50%
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GBP 5,000,000 and above: 2.00%
Whole balance
The balance determines the applicable tier, and that tier's rate applies to the full balance.
For an illustrative balance of GBP 2,000,000:
GBP 2,000,000 × 1.50% = GBP 30,000
For an illustrative balance of GBP 7,000,000:
GBP 7,000,000 × 2.00% = GBP 140,000
Partial balance
Each rate applies only to the portion of the balance within its tier.
For an illustrative balance of GBP 2,000,000:
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First GBP 1,000,000 × 1.00% = GBP 10,000
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Next GBP 1,000,000 × 1.50% = GBP 15,000
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Total = GBP 25,000
The effective annual rate is GBP 25,000 ÷ GBP 2,000,000 = 1.25%.
For an illustrative balance of GBP 7,000,000:
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First GBP 1,000,000 × 1.00% = GBP 10,000
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Next GBP 4,000,000 × 1.50% = GBP 60,000
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Remaining GBP 2,000,000 × 2.00% = GBP 40,000
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Total = GBP 110,000
The effective annual rate is GBP 110,000 ÷ GBP 7,000,000 = approximately 1.57%, rounded to two decimal places.
Cash management charges
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With whole-balance payout tiering, the applicable CMC percentage is applied to all gross interest.
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With partial-balance payout tiering, each CMC percentage is applied to the interest earned within that tier.
The final amount for a payment period also depends on the profile's day-count convention and the number of days included.
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