Marginal Relief Under the New Tax Regime 2026: How the ₹12 Lakh Rebate Cliff Actually Works

A specific piece of confusion resurfaces every filing season: taxpayers under the new regime assume that earning even ₹1 over the ₹12 lakh rebate threshold means losing the entire benefit and owing tax on the full amount — a genuine cliff edge that would make crossing ₹12 lakh the worst raise of your career. It doesn't work that way. A provision called marginal relief exists specifically to prevent this cliff, and it applies automatically — but only up to a point most taxpayers don't realise exists.

The Rebate, and the Cliff It Would Otherwise Create

For FY 2025-26 (AY 2026-27), a resident individual filing under the new tax regime gets a Section 87A rebate of up to ₹60,000, which brings tax liability to zero for taxable income up to ₹12 lakh. That ₹60,000 figure isn't arbitrary — it's exactly what the slab-rate tax on ₹12 lakh works out to under the new regime's slabs.

Without any relief provision, someone with taxable income of exactly ₹12,00,000 pays zero tax after the rebate, while someone earning ₹12,10,000 would fall out of rebate eligibility entirely and owe tax computed on the full slab structure — roughly ₹61,500 before cess. That's a jump of over ₹61,000 in tax for ₹10,000 of additional income, an outcome no reasonable tax system intends. Marginal relief exists precisely to close that gap.

How Marginal Relief Actually Works

Marginal relief caps your tax liability at the amount by which your taxable income exceeds ₹12 lakh, whenever that capped figure is lower than what the normal slab computation would produce. In effect, once you're inside the relief band, every additional rupee of income above ₹12 lakh is taxed at 100% until the excess catches up with what slab tax would otherwise charge — after which ordinary slab rates take over on their own.

Where the Relief Runs Out — Roughly ₹12.7 Lakh

Marginal relief isn't unlimited. It only helps for as long as the capped, excess-based tax figure stays below what ordinary slab computation would charge on that income. Working the math from the ₹60,000 base rebate and the 15% rate on the ₹12–16 lakh slab, the two figures converge at a taxable income of approximately ₹12,70,588 — beyond this, standard slab tax is already the smaller number, so relief has nothing left to add and taxpayers simply pay ordinary slab tax with no rebate and no cap. There's no sudden second cliff here: the transition is smooth because both calculation methods meet at that point.

What Marginal Relief Doesn't Cover

The ₹12 lakh rebate and its marginal relief apply only to income taxed at the normal slab rates — salary, business income, interest, and similar heads. They do not extend to income taxed at special rates, most notably short-term and long-term capital gains on equity and equity mutual funds. If your ₹12 lakh figure includes a chunk of capital gains, the rebate calculation gets more restrictive, a nuance our detailed guide to the 87A rebate and capital gains walks through with worked examples — read that one alongside this if equity gains are part of your income mix this year.

Why the Old Regime Rarely Faces This Problem

The old tax regime's Section 87A rebate caps out at a taxable income of ₹5 lakh, with a maximum rebate of ₹12,500. Because the old regime's zero-tax threshold sits so much lower, and its own slab rates are structured differently, the marginal-relief mechanics work out at a much smaller scale near that ₹5 lakh line — it's a real provision there too, just one that affects far fewer taxpayers given how few filers report exactly ₹5 lakh to ₹5.1 lakh in old-regime taxable income. For a fuller side-by-side on how the two regimes compare at various income levels, see our new versus old regime breakdown for salaried taxpayers.