What does maximising Section 80C actually save for a 30%-slab old-regime filer?
Scenario
Old-regime filer in 30% slab, ₹15 lakh income, contributing the full ₹1.5 lakh under 80C through a combination of PPF ₹50K + ELSS ₹50K + life insurance premium ₹30K + already-counted home loan principal ₹20K
Inputs
- Slab %
- 30
- Income INR
- 15,00,000
- Section 80c amount INR
- 1,50,000
Calculation
- 1.
Without 80C: taxable income (after ₹75K standard deduction)
₹15L − ₹75K → ₹14.25 L
- 2.
Without 80C: tax under old regime slabs
₹12.5K + 20% × ₹5L + 30% × ₹4.25L → ₹2.40 L
- 3.
With 80C ₹1.5L: taxable income
₹15L − ₹75K − ₹1.5L → ₹12.75 L
- 4.
With 80C ₹1.5L: tax under old regime slabs
₹12.5K + 20% × ₹5L + 30% × ₹2.75L → ₹1.95 L
- 5.
Tax saving from 80C
₹2.4L − ₹1.95L → ₹45,000
Conclusion
Maxing the ₹1.5L 80C cap saves ₹45,000 in tax annually for a 30%-slab old-regime filer — effectively a 30% upfront subsidy on the contribution. The benefit shrinks to ₹30K at 20% slab, ₹7.5K at 5% slab, and zero in the new regime.
Tradeoffs
The ₹45K saving is real but small versus structural choices: direct vs regular plan TER drag over 25 years (₹35L), index vs active fund choice (₹10-50L), home loan prepay vs invest math (₹20-50L). Don't let 80C optimisation drive bad instrument choices — buying ULIPs or endowment plans under 80C pressure typically destroys more value than the deduction saves.