Excel like a finance pro.
← The libraryPractice · 2 questions →
Information function
ISERR
Returns TRUE for any error except #N/A.
OccasionalDifficulty 1100 · ProficientUsage rank #181 of 520
When to use it
TRUE for any error except #N/A. Lets a "not found" pass through while catching real calculation errors.
The shape of it
- Syntax
=ISERR(value)
Worked examples
A calculation error
=ISERR(1/0) → TRUE
#DIV/0! is caught.
Not #N/A
=ISERR(NA()) → FALSE
#N/A is not.
Guard a division
=IF(ISERR(A1/B1),"check inputs",A1/B1) → check inputs
B1 is 0.
Worth knowing
- Use when #N/A means "missing" and should be handled separately.
- ISNA is the complement for just #N/A.
- IFERROR catches both.
Where it goes wrong
- Easy to confuse with ISERROR.
- Errors inside arrays still need array handling.
Related
Learn the moves here — or let Wauvel run them on your numbers.
Meet your AI CFO →One CFO-grade Excel tip a week
A short, practical email for finance operators — functions, shortcuts, and the moves that save an afternoon. Free, unsubscribe anytime.