Calculators

Quarterly installment

If you're self-employed: estimate your Q1–Q4 installments based on prior-year liability or current-year forecast.

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Self-employed

Calculator

Self-assessment installments

SET Q1–Q4 for Y/A 2025/2026. Each installment is one quarter of estimated annual tax.

Estimated annual tax payableRs. 240,000

Use prior-year liability or current-year forecast.

Rs. 0Rs. 5,000,000

Result

Rs.60,000

Per quarter (equal split)

Q115 Aug 2025Rs. 60,000

Q215 Nov 2025Rs. 60,000

Q315 Feb 2026Rs. 60,000

Q415 May 2026Rs. 60,000

Estimator only

Equal split of one annual figure. No mid-year revision or payment tracking.

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Deadlines: 15 Aug / 15 Nov / 15 Feb / 15 May for Y/A 2025/2026.

Full experience

SET installments tied to your live liability

As income changes through the year, TaxWise recalculates what each quarterly payment should be.

Forecast annual tax from actual income entered so far
SET Q1–Q4 deadlines from the active Y/A config
Record installments paid and balance due at filing

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Filing opens Apr 2026 · Y/A 2025/2026 return due 30 Nov 2026

Estimator disclaimer

Results follow the Inland Revenue Act and the 2025 Amendment for Y/A 2025/2026 but are not tax advice. Rounding, missing inputs, and simplified assumptions can change the final figure — only a filed return counts with IRD.