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Free Business Tools & Practical Guides to Grow Smarter
Calculators that show their working, and guides written from real client work. Built by TZAP Marketing for people running businesses in India.
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GST & Tax
All GST guides
Get the tax maths right the first time
Reverse GST, inclusive and exclusive pricing, and the CGST–SGST split — each with the rule that governs it, not just the arithmetic.
Latest
All guides
Latest Guides
Each one answers a question a client actually asked us. None are summaries of other blogs.
Digital Marketing
All marketing guides
Measure what your ads actually do
ROAS, CTR, CPC and CPM — plus the break-even figures your ad platform has no reason to show you.
AI & Technology
AI that earns its place
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Worth your time
When the calculator is not the hard part
TZAP Marketing builds the marketing, websites and growth systems behind the numbers — for businesses across India.