Free tools
Finance tools, free for everyone.
The calculators and references finance teams reach for. No sign-up, no email gate. Built by the OneFinOps team.
GST & Tax Tools
Income Tax Calculator
FY 2025-26 slabs. New regime + old regime with 80C, HRA and Section 24 deductions.
Try it FreeGST Calculator
Add or remove GST at 0/5/12/18/28% with CGST/SGST or IGST split.
Try it FreeTDS Rate Finder
Pick a section (194C, 194J, 194Q, 195, etc.) and amount; get the rate, threshold check and TDS due.
Try it FreeHSN & SAC Code Finder
Search 500+ HSN and SAC codes with GST rates. Filter by goods, services, or tax slab.
Try it FreeGST Late Fee Calculator
Calculate late fees and interest for delayed GST return filing. Covers GSTR-1, 3B and 9.
Try it FreeGST Invoice Generator
Create GST-compliant tax invoices with auto CGST/SGST/IGST calculation. Download as PDF.
Try it FreeE-Way Bill Calculator
Check if an e-way bill is required and calculate validity based on distance and transport mode.
Try it FreePayroll & HR Tools
CTC to In-Hand Salary
Convert CTC to take-home salary with PF, ESI, professional tax and income tax deductions.
Try it FreeEPF / PF Calculator
Calculate employee and employer PF contributions including EPF, EPS and EDLI breakdowns.
Try it FreeESI Calculator
Calculate ESI contributions for employees and employers. Check wage ceiling eligibility.
Try it FreeProfessional Tax Calculator
Calculate professional tax based on your state and salary. Covers all Indian states with PT slabs.
Try it FreeGratuity Calculator
Calculate gratuity amount based on years of service. Covers both Act-covered and non-covered employees.
Try it FreeCompliance & Business Tools
Compliance Calendar
GST, TDS, PF/ESI, PT, MCA and IT deadlines, month by month.
Try it FreeMSME Late Payment Interest
Calculate interest on delayed MSME payments under the MSMED Act. Based on 3x the RBI bank rate.
Try it FreeDSO / DPO / CCC Calculator
Calculate Days Sales Outstanding, Days Payable Outstanding and the Cash Conversion Cycle.
Try it FreeWorking Capital Calculator
Revenue, COGS, DSO, DPO and inventory days. Get working capital required and cash conversion cycle.
Try it FreeRun your finance ops on OneFinOps.
The calculators are for moments; the platform is for everyday work. AR, AP, procurement and compliance on one record.