F&O loss carry-forward calculator.
F&O loss can be valuable only if the return is filed correctly and on time. The critical mistake is filing after the statutory loss-return due date and losing carry-forward eligibility.
How to calculate
Method- Non-speculative business loss can be carried forward for 8 assessment years.
- It can be set off only against future business income.
- The loss return must be filed within the s.139(1) timing framework to preserve carry-forward.
Inputs to collect
Before you startCurrent-year F&O loss
Use broker reports, ledgers, contract notes, or invoices as support.
Other non-salary income
Use broker reports, ledgers, contract notes, or invoices as support.
Return filing date
Use broker reports, ledgers, contract notes, or invoices as support.
Due date under s.139(1)
Use broker reports, ledgers, contract notes, or invoices as support.
Prior-year carried-forward losses
Use broker reports, ledgers, contract notes, or invoices as support.
Common mistakes
Avoid theseSalary set-off not allowed
Business loss cannot be set off against salary income.
Late return can kill carry-forward
If the loss return is late, future carry-forward can be disallowed.
Track assessment years
The 8-year clock runs by assessment year, not from each trade date.
Frequently asked questions
- How long can F&O loss be carried forward?
- Generally 8 assessment years as non-speculative business loss.
- Can F&O loss offset salary?
- No. Business loss cannot be set off against salary.
- What if I file late?
- Late filing can prevent carry-forward of the loss, even if same-year set-off may still be computed differently.
Run the live checker.
This page explains the method. The linked tool performs the working.
Open loss set-off checkerKnow the source logic.
FnOTax pages separate official-source rules from broker-report assumptions.
How we verify