Durbin Interchange Cap Reg II Checker
Audit explicit caller RegII covered issuer fixed/advalorem/eligible fraud-adjustment cap under exact minor rounding, no legal threshold default. Caller independently verifies edition, jurisdiction, applicability and one currency; screening does not establish legal compliance, coverage or bank approval.
Description
A covered debit-interchange cap combines fixed, proportional and eligible adjustment components.
A covered debit-interchange cap combines fixed, proportional and eligible adjustment components.1
Applicability and current cap values must be independently established before a fee comparison. Use Durbin Interchange Cap Reg II Checker to evaluate the supplied inputs under the model explained below.
When to use Durbin Interchange Cap Reg II Checker
Use Durbin Interchange Cap Reg II Checker to evaluate the supplied inputs under the model explained below. Establish the currency and minor-unit convention, measurement period and applicable transaction or institution context.
How to use Durbin Interchange Cap Reg II Checker and understand its results
- Establish the currency and minor-unit convention, measurement period and applicable transaction or institution context.
- Enter Transaction minor, Caller verified covered issuer, Caller fixed cap minor, Caller ad valorem cap bps, Caller eligible fraud adjustment minor, Observed interchange minor using the field table and validation rules below, then run the tool.
- Read Caller modeled covered cap minor, Signed observed minus cap minor, Caller covered cap exceeded; interpret the units, signs, ordering and unknown-value placeholders described below.
- Correct reported input errors and rerun. Apply successful results according to their specific meanings and check the assumptions before using them in a decision.
| Input field | Meaning | Value type | Requirement |
|---|---|---|---|
| transactionMinor | Transaction minor | number | Required; constraints below |
| callerVerifiedCoveredIssuer | Caller verified covered issuer | boolean | Required; constraints below |
| callerFixedCapMinor | Caller fixed cap minor | number | Required; constraints below |
| callerAdValoremCapBps | Caller ad valorem cap bps | number | Required; constraints below |
| callerEligibleFraudAdjustmentMinor | Caller eligible fraud adjustment minor | number | Required; constraints below |
| observedInterchangeMinor | Observed interchange minor | number | Required; constraints below |
Enter transaction, fixed cap, eligible fraud adjustment and observed interchange as nonnegative integer minor units up to 1000000000000, integer proportional rate 0–10000 basis points and independently verified coverage=true. False coverage is an input error. Compute cap=fixed+nearest-minor half-away rounded amount×bps/10000+adjustment. Return cap, observed minus cap and strict exceeded flag; equality does not exceed. No current Reg II constants, issuer-size check or adjustment eligibility is installed.
cap=fixed+round(amount×adValoremBps/10000)+eligibleAdjustment; exceeded=observed>cap Use the field order, units and branch conditions described above.
| Output field | Meaning | Value type |
|---|---|---|
| callerModeledCoveredCapMinor | Caller modeled covered cap minor | number |
| signedObservedMinusCapMinor | Signed observed minus cap minor | number |
| callerCoveredCapExceeded | Caller covered cap exceeded | boolean |
{
"input": {
"transactionMinor": 10000,
"callerVerifiedCoveredIssuer": true,
"callerFixedCapMinor": 21,
"callerAdValoremCapBps": 5,
"callerEligibleFraudAdjustmentMinor": 1,
"observedInterchangeMinor": 30
},
"output": {
"callerModeledCoveredCapMinor": 27,
"signedObservedMinusCapMinor": 3,
"callerCoveredCapExceeded": true
}
}Limitations and assumptions
Applicability and current cap values must be independently established before a fee comparison. Apply the exact scope and assumptions explained above.
All listed fields require explicit values. Unexpected fields, incorrect types, nonfinite numbers and sparse arrays fail validation. Domain-specific bounds, alignments and supported tokens are explained above; extremely large inputs or outputs can also be rejected. Input errors differ from successful false results, empty match lists and unknown-evidence placeholders.
Alternative or Complementary methods
Use Reg Z APR Tolerance Disclosure Checker for a related task: APR disclosure accuracy concerns the difference between disclosed and independently calculated rates.
Use Nacha Web Debit Fraud Monitoring Supplemental Rule Lookup for a related task: WEB debit fraud-screening requirements depend on the applicable ACH rules and effective date.
References
-
Durbin Interchange Cap Reg II Checker — tool.io
Similar or alternative tools
- Reg Z APR Tolerance Disclosure Checker
APR disclosure accuracy concerns the difference between disclosed and independently calculated rates.
- Nacha Web Debit Fraud Monitoring Supplemental Rule Lookup
WEB debit fraud-screening requirements depend on the applicable ACH rules and effective date.