About the Author

Mohsin Iqbal

Founder and Director, SM Services Pty Ltd · Melbourne, Victoria, Australia
Bachelor of Information Technology

I built MegaCalcOnline.com because the calculators I could find were not built for Australians. They used American tax brackets, quoted thresholds from three financial years ago, or made you hand over an email address to work out a mortgage repayment. For a country with its own tax system, its own superannuation rules and its own measurement conventions, that seemed like a gap worth closing.

My background is information technology rather than accounting or finance. That shapes how this site works, and it is worth being direct about what it does and does not mean.

What I Am Not

I am not a tax agent, a financial adviser, a mortgage broker or a medical professional. I am not licensed to give personal advice in any of those fields, and nothing on this site is personal advice.

I say this plainly because a lot of sites in this space imply expertise they do not hold. The calculators here are trustworthy for a different reason: not because I am an accountant, but because every rate comes from a published official source, every formula is stated on the page, and every calculation is tested against worked examples before it goes live. You can check the working rather than taking my word for it.

Where a question needs professional judgement rather than arithmetic, the pages say so and point you to the ATO, Moneysmart, a registered tax agent or your GP. That is not a disclaimer bolted on at the end. It is the honest boundary of what a calculator can do.

What I Actually Do Here

I research, build, test and maintain every calculator and article on this site. In practice that means:

1. Sourcing the rules first. Tax and super figures come from ATO publications, pension rates from Services Australia, stamp duty from each state revenue office. Not from other calculator websites.
2. Writing and testing the calculation before writing a word of content. Every calculator is checked against examples with known answers, including the cases that break things: zero and blank inputs, negative values, and the boundaries between tax brackets or grade bands.
3. Explaining the method, not just the result. A number you cannot verify is a number you cannot rely on, so the pages show the formula and the substitution.
4. Updating when the rules change. Most rate-based pages are reviewed at the start of the financial year and whenever a change is announced.
5. Fixing things when they are wrong. Errors get found. What matters is what happens next.

Why Information Technology Turns Out to Matter

New technology is what I find genuinely interesting, and it is what makes this site possible as a one-person operation. Every calculator runs in your browser rather than on a server, which is why nothing you type is transmitted or stored, why the tools work on a phone with a poor connection, and why they are free with no account required.

It also shapes how the calculators behave when they cannot give a good answer. A target that is mathematically out of reach is reported as unreachable rather than as a percentage above 100. Weights that do not add to 100% produce a warning rather than a silently rescaled result. Getting the failure cases right takes more work than getting the happy path right, and it is the difference between a tool you can trust and one that looks confident while being wrong.

The Company

MegaCalcOnline.com is operated by SM Services Pty Ltd, an Australian registered company based in Melbourne, Victoria, of which I am director. The site is funded by advertising, which pays for hosting and development. Advertisers have no influence over what is published — the full position is set out in our editorial policy.

Corrections and Contact

If you find an error, I would rather know. Rates change, formulas get misread, and edge cases surface that testing missed. Get in touch through the contact page with the page address and what you believe is wrong.

I aim to acknowledge reports within a few business days, correct genuine errors promptly, and note any correction that materially changes a published result rather than quietly amending the page. How that process works is set out in the editorial policy, and the formulas and data sources behind each category of calculator are in the calculator methodology.

Frequently Asked Questions