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Tools & Resources

Free tools anyone can use online, plus secure areas for our team and clients.

Free tools 5

Advance Tax Calculator FY 2026-27 (AY 2027-28) — Installments & 234B/234C Interest Saved

Free advance tax calculator for FY 2026-27 across all five heads of income. Compare old vs new regime, get your four installment due dates, and see the 234B/234C interest you save by paying on time.

Annual Compliance Due-Date Calculator

Free compliance calendar for Indian businesses. Enter your entity type, turnover, and audit status to get every GST, TDS, ROC, and income-tax due date for the year — so you never miss a filing deadline.

GST Invoice Generator — Free Online Tool

Create GST-compliant invoices instantly — B2B, B2C, exports, and reverse-charge. Add line items with HSN/SAC codes, auto-calculate CGST/SGST/IGST, and download a print-ready PDF. No login needed.

Income Tax Calculator FY 2025-26 (AY 2026-27) — All 5 Heads, Old vs New Regime

Free income tax calculator for FY 2025-26 covering salary, house property, business, capital gains and other sources, with deductions and exempt income. Compare old vs new regime instantly.

Payoff — Smart EMI & Prepayment Planner

See exactly how much interest you save by paying a little extra each month. Enter your loan details and prepayment plan to get a month-by-month amortisation schedule and your new payoff date.

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Team Tools

Internal tools for the RDT team. Password required.

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Client Tools

Private tools we build for clients. Password required.

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DisclaimerThese tools are provided free of charge for general informational and convenience purposes only and do not constitute professional, accounting, tax or legal advice. RDT & Associates (formerly Dhiraj Tawari & Associates) and its partners accept no responsibility or liability whatsoever for any output, error or decision arising from their use. Always consult your own Chartered Accountant or a qualified professional before making any financial, tax or business decision.