Quick answer
Calculate interest portion of a payment.
=IPMT(B2/12,1,C2,-A2)Example data layout
Use a small table first, confirm the result, then copy the formula down the column.
| Input | Helper value | Result |
|---|---|---|
| A2 | B2 | Formula result |
| A3 | B3 | Copied formula result |
Copy-paste examples
Beginner
Basic IPMT example
=IPMT(B2/12,1,C2,-A2)Adjust the cell references to match your worksheet layout.
Beginner
IPMT copied down rows
=IPMT(B3/12,1,C2,-A3)Adjust the cell references to match your worksheet layout.
Intermediate
IPMT with clean fallback
=IFERROR(IPMT(B2/12,1,C2,-A2),"")Adjust the cell references to match your worksheet layout.
Intermediate
IPMT with structured references
=IPMT([@Value]/12,1,[@Cost],-[@Input])Adjust the cell references to match your worksheet layout.
Advanced
IPMT with dynamic data
=IPMT(B2/12,1,C2,-A2)Adjust the cell references to match your worksheet layout.
Advanced
IPMT inside a report formula
=LET(result,IPMT(B2/12,1,C2,-A2),result)Adjust the cell references to match your worksheet layout.
Step-by-step tips
- Paste the formula into the first result cell.
- Replace sample references like A2, B2, or Table1 with your real cells or table columns.
- Test the formula on two or three rows before copying it down.
- Format the result column as Number, Date, Currency, or Percentage when needed.
- Keep a backup copy of your original data before applying formulas across a large range.
Common mistakes
- Using text values where Excel expects numbers or dates.
- Forgetting quotation marks around text criteria.
- Copying a formula without locking fixed references using dollar signs.
- Applying the wrong number format and thinking the formula is wrong.