Rate Lock Extension Fee Lookup
Audit actual rate-lock extension quote under explicit principal×per-day basis points plus flat fee/cap, single exact rounding of aggregate extension, no bank fee schedule assumed. Caller independently verifies edition, jurisdiction, applicability and one currency; screening does not establish legal compliance, coverage or bank approval.
Description
A rate-lock extension fee can combine a flat charge with a principal-based daily charge.
A rate-lock extension fee can combine a flat charge with a principal-based daily charge.1
A contractual cap changes the modeled fee before it is compared with a quote. Use Rate Lock Extension Fee Lookup to evaluate the supplied inputs under the model explained below.
When to use Rate Lock Extension Fee Lookup
Use Rate Lock Extension Fee Lookup 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 Rate Lock Extension Fee Lookup and understand its results
- Establish the currency and minor-unit convention, measurement period and applicable transaction or institution context.
- Enter Caller loan principal minor, Caller lock extension days, Caller per day extension bps, Caller flat extension minor, Caller fee cap minor, Observed quoted extension minor using the field table and validation rules below, then run the tool.
- Read Caller uncapped extension fee minor, Caller capped extension fee minor, Signed quote minus caller fee minor; 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 |
|---|---|---|---|
| callerLoanPrincipalMinor | Caller loan principal minor | number | Required; constraints below |
| callerLockExtensionDays | Caller lock extension days | number | Required; constraints below |
| callerPerDayExtensionBps | Caller per day extension bps | number | Required; constraints below |
| callerFlatExtensionMinor | Caller flat extension minor | number | Required; constraints below |
| callerFeeCapMinor | Caller fee cap minor | number | Required; constraints below |
| observedQuotedExtensionMinor | Observed quoted extension minor | number | Required; constraints below |
Enter loan principal, flat extension fee, cap and observed quote as nonnegative integer minor units up to 1000000000000, extension days as integer 0–3660 and daily rate as integer 0–10000 basis points. Calculate principal×days×dailyBps/10000 with exact integer arithmetic rounded to nearest minor unit, halves away from zero, then add flat fee and apply min(fee,cap). Return uncapped fee, capped fee and quote minus capped fee. No lender tariff, rate-lock eligibility or day-count policy is selected.
fee=flat+round(principal×days×dailyBps/10000); capped=min(fee,cap); discrepancy=quote−capped Use the field order, units and branch conditions described above.
| Output field | Meaning | Value type |
|---|---|---|
| callerUncappedExtensionFeeMinor | Caller uncapped extension fee minor | number |
| callerCappedExtensionFeeMinor | Caller capped extension fee minor | number |
| signedQuoteMinusCallerFeeMinor | Signed quote minus caller fee minor | number |
{
"input": {
"callerLoanPrincipalMinor": 10000,
"callerLockExtensionDays": 3,
"callerPerDayExtensionBps": 5,
"callerFlatExtensionMinor": 100,
"callerFeeCapMinor": 110,
"observedQuotedExtensionMinor": 120
},
"output": {
"callerUncappedExtensionFeeMinor": 115,
"callerCappedExtensionFeeMinor": 110,
"signedQuoteMinusCallerFeeMinor": 10
}
}Limitations and assumptions
A contractual cap changes the modeled fee before it is compared with a quote. 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 Extra Principal Interest Saved Calculator for a related task: Extra principal can reduce future interest in a fixed monthly amortization model.
Use ARM Reset Payment Change Calculator for a related task: An ARM reset combines an index, margin and contractual rate limits.
References
-
Rate Lock Extension Fee Lookup — tool.io
Similar or alternative tools
- Extra Principal Interest Saved Calculator
Extra principal can reduce future interest in a fixed monthly amortization model.
- ARM Reset Payment Change Calculator
An ARM reset combines an index, margin and contractual rate limits.