Old vs new regime
Salary figures, then HRA, then both regimes side by side.
5 systems · free worksheets
Step-by-step systems for tax, salary and forms
A system is a short path through a whole job, such as checking a salary slip or working out HRA. Each one lists the steps in order, points to the calculators you need along the way, and ends with a free printable page.
Updated
Quick answer
There are 5 systems here, from 3 to 6 steps each. Pick the job closest to yours, follow the steps in order, and print the worksheet at the end. The sums are arithmetic on official figures.
Tax and salary
Compare the two tax regimes, check a payslip line by line, and work out HRA.
Salary slip check
Split the CTC, check wages, PF, PT, ESI and TDS, match the bank credit.
HRA exemption
Conditions, rent records, split the year, least of three, Form 124.
GST
Check an invoice before you send it or pay it.
GST invoice check
Document type, HSN and rate, the split, tax per line, rule 46 fields.
Forms and dates
Get your age right on exam and admission forms.
Age on a cut-off date
How exam and admission forms count your age "as on" a date.
How a system works
Each system starts with a quick answer and a decision: do it yourself, skip the full plan, or get help. Then come the steps, with a list of what to have ready for each one. After that you see what usually goes wrong, the variants that change the steps, and the official source we checked.
Tips and tricks
- Open the worksheet first and fill it in as you go. The blanks tell you what to look up before you start.
- Use the calculator linked at a step only when you reach that step. The earlier steps decide which numbers go in.
- Check the "updated" date on a system before you rely on it. Rules for tax year 2026-27 differ from older articles online.
- If two systems touch the same job, such as the tax regime and HRA, do the smaller one first and carry its result forward.
What we would do
We would start with the system that matches a deadline you already have: the regime choice if your employer is asking for a declaration, the salary slip check if a payslip looks off, the age check if a form is open. Print its worksheet, work through it once, and keep the page with your papers.
Frequently asked questions
What is a system on this site?
A system is a page that takes one complete job and splits it into numbered steps. Each step says what to have ready, and the page links to the calculators that do the sums. Every system also has a one-page printable worksheet.
Is the printable worksheet free?
Yes. Each system has a free one-page worksheet in black and white, with tick boxes and blanks. You do not need an account to open or print it.
Do I have to use the calculators to follow a system?
No. The steps explain the arithmetic, so you can do the sums by hand. The calculators save time and show their working.
Is this tax or financial advice?
No. The systems are arithmetic on official figures. Your employer's TDS, your return and a qualified adviser settle your actual position.
How do I know a system is current?
Each system shows an updated date and names the official source we checked, with the month. If a rule changes, the date on the page changes with it.
Numbers only, not advice.