Cash discount cost calculator
Work out whether offering or taking a cash discount makes sense using your own figures. Check the assumptions before you act on the result.
Your figures
Result
- Yearly cash discount cost percent
- 21.28%
How it is worked out
yearly cost % = discount % ÷ (100 - discount %) x 365 ÷ (full credit days - discount days) x 100
yearly_cash_discount_cost_percent = discount_percent/(100-discount_percent)*365/(full_credit_days-discount_days)*100
What it works out
The cash discount cost calculator turns records from the business into a figure for this decision: whether offering or taking a cash discount makes sense. Use it when the responsible owner and accountant needs a consistent answer for this specific task. The answer uses only the values entered. Record the measurement period beside it.
What you need
| Input | Unit | Where to find it |
|---|---|---|
| Discount percent (example: 2 %) | % | Take discount percent from the latest cost sheet, supplier quote, agreement or invoice. |
| Full credit days (example: 45 days) | days | Read full credit days from the invoice-wise Tally ledger, bank statement or cash report. |
| Discount days (example: 10 days) | days | Take discount days from the latest cost sheet, supplier quote, agreement or invoice. |
Use the same item, period and measurement unit for related inputs. If a figure comes from an estimate rather than an actual record, mark it as estimated. Keep your original figures beside the result.
The formula
In plain words, calculate yearly cash discount cost percent using the measured inputs below. The expressions are shown without hidden rounding so they can be checked by hand.
- yearly cash discount cost percent:
yearly_cash_discount_cost_percent = discount_percent/(100-discount_percent)*365/(full_credit_days-discount_days)*100.
Formula basis from the supplied taxonomy: yearly cost % = discount % ÷ (100 - discount %) x 365 ÷ (full credit days - discount days) x 100. The calculation assumes the named inputs describe the same job and accounting period. Keep quantities, rates and measured units consistent.
A worked example
Illustrative example: an auto-component supplier uses the figures in the table above. These are example inputs, not industry averages. For this example, the main figures are discount percent: 2 %, full credit days: 45 days, discount days: 10 days.
- Yearly cash discount cost percent:
discount_percent/(100-discount_percent)*365/(full_credit_days-discount_days)*100. With the example figures,2.0 / (100 - 2.0) * 365 / (45.0 - 10.0) * 100gives 21.28 %.
How to act: Use the result to compare it with the bank and cash calendar. Write down the input date and the assumption that could move most.
How to read the result
Example bands, change them for your business:
- Comfortable: Your result meets the target for this item or reporting period. Keep the calculation with its source records and compare it with the bank and cash calendar.
- Watch: The result is close to your action limit, or it changed since the previous calculation. Recheck discount percent and full credit days using the original records.
- Act: The result breaks a limit already agreed by the manager or owner. Record the difference, name a responsible person, and agree a correction date. For an operational starting point, read [Cash next week unknown](/problems/cash-next-week-unknown) and [Monthly owner report](/processes/monthly-owner-report). Do not use these example bands as published industry benchmarks.
Copy it into a spreadsheet
Create a sheet with column A for the label and column B for the number or formula. The expressions work in Excel or Google Sheets. Keep input cells editable and result cells protected from typing.
| Cell | Label | Value or formula |
|---|---|---|
| B2 | discount percent | 2.000000 |
| B3 | full credit days | 45.000000 |
| B4 | discount days | 10.000000 |
| B6 | yearly cash discount cost percent | =((((B2/(100-B2))*365)/(B3-B4))*100) |
For any formula containing a divisor, enter a value above zero. For any monetary output, format the cell in Indian rupees. Do not replace the cells with rounded figures until the final display.
What this calculator leaves out
- A period average hides daily peaks, uncertain collections and seasonal payment timing.
- This is an annualised comparison of the discount against the extra credit days, not a guaranteed return.
- The formula does not check whether the records are complete. Start with balances from Tally and the bank statement, then separate disputed or unlikely receipts.
Common mistakes
- Mixing periods. Using discount percent from one month with full credit days from another produces a number that looks precise but is hard to act on.
- Trusting old figures. Recheck the relevant source record before reusing last month's saved inputs. Read the result alongside the dates cash must actually leave the bank.
- Treating an estimate as approval. Record which assumptions were entered by hand. Get the relevant owner, accountant or technician to check unusual values.
A number like this helps only if someone works it out again when things change.
Questions people ask
Where do I find the numbers for cash discount cost calculator?
Take discount percent from the latest cost sheet, supplier quote, agreement or invoice. Read full credit days from the invoice-wise Tally ledger, bank statement or cash report. Keep all inputs from the same period.
Can I use this number to approve a purchase or payment?
Use it as a first check. Use the result to compare it with the bank and cash calendar. Write down the input date and the assumption that could move most. If the result affects tax, legal duties, workplace safety or a major investment, obtain the appropriate review.
When should I calculate it again?
Recalculate when a meaningful input changes, and at the next regular review of the relevant register. Save the date and the input values so changes can be explained.