Income Inputs
Enter income, salary or pension details, deductions and other relevant values carefully because small input errors can change the estimate.
TechnWaves Income Tax Calculator
Estimate old and new regime tax for AY 2026-27 with deductions, rebate notes, cess, and practical India-focused tax inputs.
Use this income tax calculator to estimate tax for AY 2026-27 using the selected tax regime, salary or pension status, standard deduction, old-regime deductions, rebate notes and cess.
It is useful for salaried people, freelancers, consultants and small business owners who want a quick tax estimate before planning deductions, advance tax, invoices or yearly records.
The calculator gives an estimate from the numbers you enter. It does not handle every special case such as capital gains, surcharge, foreign income, business expense treatment, losses or special-rate income.
Before filing or making tax decisions, compare the estimate with official rules, Form 16, AIS, TIS, bank records, invoices and professional advice where needed.
When should you use this tool?
- You want a quick estimate of annual income tax payable.
- You need to understand how taxable income changes after deductions.
- You are checking whether rebate and cess affect your final estimate.
- You want to plan records before filing your income tax return.
How to use this tool
- Enter your annual income based on salary, pension, freelance income or business estimate.
- Choose whether salary or pension standard deduction applies.
- Select old or new tax regime and add old-regime deductions only when using old regime.
- Choose the age category when old-regime slab selection matters.
- Review taxable income, rebate, cess and final payable estimate before using the result.
Example: salaried taxpayer checking new regime tax
A salaried person enters annual income of Rs 9,00,000 and chooses the new regime. The calculator applies the relevant standard deduction and estimates slab-wise tax, rebate and cess.
The result helps the person understand whether tax is likely to be payable, but it should still be checked with Form 16, employer declarations, AIS/TIS and current filing rules.
If the person has large 80C, 80D, HRA or home loan deductions, they can use the old vs new regime calculator to compare both regimes before deciding.
Common mistakes to avoid
- Treating the estimate as final filing advice.
- Adding old-regime deductions while using new regime.
- Forgetting that salary standard deduction does not apply to every income type.
- Ignoring surcharge, capital gains or special income cases.
- Using old slab information without checking the assessment year.
- Not matching the estimate with Form 16, AIS, TIS and actual income records.
Tax estimate note
This calculator is for educational tax estimates only. Income tax rules, rebate limits, deductions, surcharge and special income treatment can change. Verify with official sources or a qualified tax professional before filing.
Frequently Asked Questions
Is this income tax calculator accurate for filing?
It gives an estimate only. Verify slabs, rebate, surcharge, deductions and special income treatment before filing your return.
Can freelancers use this calculator?
Yes. Freelancers can enter annual income for a basic estimate, but business expenses, presumptive taxation and TDS should be reviewed separately.
Does standard deduction apply to everyone?
No. Standard deduction generally applies to salary or pension income. Select salary or pension only when it fits your case.
Does this include old and new regime?
This page estimates the selected regime. Use the old vs new regime calculator for side-by-side comparison.
Does it include cess?
Yes. The calculator adds health and education cess after estimating tax and rebate.
Should I include GST collections as income?
Do not blindly mix tax collected with business income. Review accounting treatment with your accountant.
Can this replace a CA or tax professional?
No. It is a quick estimate tool. Use professional advice for filing, business income, capital gains or complex cases.
What records should I keep?
Keep Form 16, invoices, bank statements, investment proofs, rent proofs, loan interest certificates, TDS details and AIS/TIS records.
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Helpful details before using this tool
Tax Assumptions
The calculator uses selected slab and deduction assumptions. Special income, surcharge, rebate eligibility and filing details may need separate review.
Rule Verification
Verify the latest tax rules, forms, AIS/TIS details and deduction proofs before filing or making tax-payment decisions.