Accounting Calculators: GST, Tax, Margin & Invoices

Everyday accounting math — taxes, margins and invoices — is faster with the right calculators. This guide covers the free tools on Taskly's accounting tools page.

GST & Sales Tax

The GST calculator and sales tax calculator compute tax amounts and totals including tax.

Margins & Pricing

The margin calculator shows profit from cost and selling price, and the unit price calculator prices products correctly.

Invoices

The invoice generator includes line items, tax and discounts, then prints or downloads a professional invoice.

Salaries & Discounts

The salary calculator converts pay periods and the discount calculator prices sales correctly.

Get Started

All calculations use standard formulas and run locally. Browse at accounting calculators.

Frequently Asked Questions

How do I calculate GST or sales tax?

Enter the amount and tax rate into the GST calculator (or sales tax calculator) to get the tax amount and the total including tax in one step.

How do I calculate profit margin?

The margin calculator takes cost and selling price to show margin percentage and profit, so you can price products correctly.

Can I generate invoices with tax?

Yes. The invoice generator includes line items, tax rates and discounts, then lets you print or download a professional invoice.