Refund Delay
Estimate simple interest from caller-supplied refund delay and interest assumptions.
Description
A refund-delay model accrues simple interest after a supplied interest-free period.
A refund-delay model accrues simple interest after a supplied interest-free period. It uses a fixed 365-day denominator.1
Estimate simple interest from caller-supplied refund delay and interest assumptions.
When to use Refund Delay
Use this tool to estimate simple interest from caller-supplied refund delay and interest assumptions.
Choose the specific arithmetic or checklist scenario and establish its input amounts, dates, rates and criteria from the applicable records. Keep currencies, periods and jurisdictions consistent; review the tool-specific assumptions before interpreting the result.
How to use Refund Delay and understand its results
- Choose the specific arithmetic or checklist scenario and establish its input amounts, dates, rates and criteria from the applicable records. Keep currencies, periods and jurisdictions consistent; review the tool-specific assumptions before interpreting the result.
- Enter delayDays, interestFreeDays, refundAmount, annualInterestRatePercent using the field table and calculation rules, then run the tool.
- Read interestBearingDays, estimatedSimpleInterest, estimatedRefundWithInterest. The explanation below defines the units, signs, ordering and any flags or placeholder values.
- If the tool reports an input issue, correct the values and run it again. Apply the stated assumptions when interpreting a successfully returned result.
| Input field | Meaning | Value type; see rules below | Requirement |
|---|---|---|---|
| delayDays | Refund delay (days) | integer; minimum: 0 | Required |
| interestFreeDays | Interest-free period (days) | integer; minimum: 0 | Required |
| refundAmount | Refund amount | number; minimum: 0 | Required |
| annualInterestRatePercent | Annual interest rate (%) | number; minimum: 0 | Required |
Enter nonnegative refund/rate and nonnegative integer delay/free days. Return interest-bearing days, simple interest and refund plus interest.
interestDays=max(0,delayDays−freeDays); interest=refund×annualRate/100×interestDays/365 Units, indexing, boundary conditions and exceptional cases are defined in the calculation rules above.
| Output field | Meaning | Value type |
|---|---|---|
| interestBearingDays | Interest-bearing delay (days) | integer; minimum: 0 |
| estimatedSimpleInterest | Estimated simple interest | number; minimum: 0 |
| estimatedRefundWithInterest | Estimated refund with interest | number; minimum: 0 |
{
"input": {
"delayDays": 40,
"interestFreeDays": 10,
"refundAmount": 3650,
"annualInterestRatePercent": 10
},
"output": {
"interestBearingDays": 30,
"estimatedSimpleInterest": 30,
"estimatedRefundWithInterest": 3680
}
}Limitations and assumptions
This does not track actual refund status or establish interest entitlement. Changing rates, compounding and leap-year-specific conventions are not implemented.
Numeric inputs must be finite. Follow the calculation-specific rules for overflow, underflow and exceptional cases. Missing required fields, extra fields, wrong value types and violations of the calculation rules are input errors.
Alternative or Complementary methods
Use Amended-Return Delay: Measure amended-return processing delay against a caller-supplied expectation. For a complementary task, use Summons Response Window: Calculate a tax-summons response deadline from a caller-supplied window.
References
-
Refund Delay — tool.io
Similar or alternative tools
- Amended-Return Delay
Measure amended-return processing delay against a caller-supplied expectation.
- Summons Response Window
Calculate a tax-summons response deadline from a caller-supplied window.