Payday Super calculator - 12% in 7 business days (free)

A single offline HTML page for Australian employers after Payday Super started on 1 July 2026.

Type qualifying earnings for a payday. It multiplies by 12%, optionally caps against the published 2026-27 maximum contribution base of $270,830, and adds 7 business days (or 20 for a new employee's first contribution) so you can see when the money must have reached the fund.

Double-click sg.html. Works from file://. No account.

Not tax advice. Not an ATO product. It does not decide what counts as qualifying earnings, does not skip public holidays, and does not pay super. Confirm on ato.gov.au.

If you want the GST ledger that sits next to payroll, TinyBAS is a one-time A$19 download: https://payhip.com/b/Bsukb