Old vs New Tax Regime: How to Actually Decide
The new tax regime is now the default. You are placed in it unless you actively choose otherwise — which means doing nothing is a decision, and for some taxpayers it is the wrong one.
What separates the two
The new regime offers wider slabs and lower rates, but strips out most deductions and exemptions. The old regime keeps higher rates alongside the full deduction set — 80C, 80D, HRA, LTA, home loan interest on a let-out or self-occupied property, and the rest.
So the question is arithmetic: are your deductions large enough to outweigh the rate difference?
The break-even way to think about it
Rather than comparing slab tables, total up what you genuinely claim each year:
- Section 80C — PF, PPF, ELSS, life insurance premium, principal on a home loan, tuition fees
- Section 80D — health insurance for yourself and parents
- HRA, if you rent and your salary is structured for it
- Home loan interest under Section 24(b)
- NPS contributions, including the employer contribution route
- Standard deduction, available under both regimes
Add them up. If the total is modest, the new regime almost always wins. If you are claiming substantial HRA plus a home loan plus a full 80C, the old regime frequently still wins. The middle ground is where it genuinely needs computing both ways.
Rates and slab boundaries are revised in most Budgets, so run the comparison against the current year's figures rather than last year's conclusion.
When you can switch
This is where salaried and business taxpayers differ sharply.
Salaried individuals with no business income may choose their regime each year while filing. You can move between them annually as your circumstances change.
Taxpayers with business or professional income get one opportunity to opt out of the new regime and one to return. Once you have switched back, the choice is generally final. Treat it as a long-term decision, not an annual optimisation.
Practical points people miss
- Your employer's TDS is deducted on the regime you declare at the start of the year. Declaring one and filing under the other is allowed for salaried taxpayers, but it means a refund claim or a shortfall to settle.
- A regime choice made for TDS convenience is not binding at filing, for salaried taxpayers.
- Investments made purely to save tax under the old regime should still make sense as investments. A poor product with a deduction attached is still a poor product.
- If you are close to the break-even point, factor in next year too — a home loan starting or an insurance policy maturing shifts the answer.
The short version
Do not assume the default is right for you, and do not assume the old regime is right because it always was. Both take ten minutes to compute properly, once a year.
Want both regimes computed on your actual figures before you commit? Talk to Kunal P Shah & Co.