Capital Loss Harvesting: Smart Planning or Tax Mistake?

A portfolio screen showing an unrealised loss does not create a tax loss. The sale must be real, correctly classified and economically supportable.

What the taxpayer should understand

• The Income-tax Act, 2025 took effect on 1 April 2026. FY 2025–26 and AY 2026–27 remain governed by the Income-tax Act, 1961, including the notified AY 2026–27 ITR forms. Tax year 2026–27 beginning 1 April 2026 is governed by the 2025 Act and the Income-tax Rules, 2026. Legacy section numbers and forms should therefore be used only for the period to which they legally apply.
• For FY 2025–26, capital-loss set-off and carry-forward follow the 1961 Act rules.
• Short-term and long-term capital losses have different permitted set-offs.
• Transactions between related parties, circular trades or pre-arranged repurchases require substance, market-price and anti-abuse review.
• Brokerage, STT, spread, exit load and market movement can exceed the expected tax value.
• A carry-forward strategy can fail if the return is filed late.

Use the ITR Form Selector — AY 2026–27 to work through the related inputs before acting.

The five-point review

For the connected rule, example or next step, see Mutual Fund Capital Gains Tax Planning 2026.

Practical example

For the connected rule, example or next step, see Tax on ESOP Exercise vs Sale: Cash-Flow Planning.

How to apply the framework

Model tax benefit after transaction costs and portfolio risk.

Preserve contract notes and market evidence, especially where repurchase occurs soon.

For the connected rule, example or next step, see Capital Gains Account Scheme: Deposit Deadlines, Withdrawals and Tax Traps.

Filing-control workflow

Fix the tax period and statutory route

Identify the financial year, assessment year or tax year before using any threshold, form or section. Review asset, loss and gain together. A form filed in June 2026 for AY 2026–27 remains an old-Act filing, while an event occurring after 1 April 2026 can fall under the new Act.

Reconcile the commercial evidence

Start from contracts, invoices, bank statements, payroll, broker records, property documents and statutory certificates. Then reconcile AIS, TIS, Form 26AS, ITR schedules, tax payments and prior returns. Portal information can contain gross values, timing differences or reporting errors and should not replace primary evidence.

Test the live filing result

Review validation messages, selected regime, form acknowledgements, loss schedules, tax-credit matching and processed intimation. Preserve the filed JSON or form, computation, supporting schedules, transaction IDs and any correction request. A saved draft or payment debit is not proof that the statutory task is complete.

Implementation checkpoint

Before treating the filing step as complete, verify the live portal or processed outcome. Confirm the form and regime, taxable income, losses, tax credit, payment mapping, deduction schedule and acknowledgement. Record any remaining mismatch, responsible person and correction deadline. This check prevents a technically submitted return from preserving the wrong tax result.

Action checklist

• Identify compatible gains.
• Verify holding period.
• Estimate net tax benefit.
• Execute genuine market transaction.
• Reconcile contract notes.
• File loss return on time.

Evidence to keep

• Broker statements
• Contract notes
• Holding-period and cost working
• Tax-benefit calculation
• Filed loss schedule

Warning signs

Finin2min takeaway