I wrote a script to yank rates and lending product details from a few sources, de-duped them and tracked it over time. The tabs are ordered by date.
There's more than 6000 home loan lending products, this is all you'll ever need for making a decision without a broker. However keep in mind terms and conditions may differ from spreadsheet, so be sure to dot your i's and cross your t's. This is not financial advice. See @geek001's reply re: Tic:Toc. In some cases "Members Only" or package deals aren't included, this is because the data source does not list them. See Me Bank example below.
Update: I've started just uploading a daily CSV as the XSLX was getting too big. Historical CSV's available upon request.
https://mega.nz/file/vZ8WCaLC#NmY-z2On4yGVcozTrS1uE12JzCte0L… (July 12 2024)
There's a new worksheet added to the XSLX for every new day, the first sheet is just a formatted page of stale data. There's a copy of the daily data going back a few months, scroll all the way to the end for the last one.
https://mega.nz/file/jZVRjaqZ#HU5LBTp23D2XtSic5d7zkEgVA4e3XVNL3zsznbcWLsk (last updated Jan 27 2022)
I assume over time this information will become less available as different sources make scraping harder.
Thanks for your work OP. How soon is too soon to refinance? Most recent was was April 2022 to HSBC. It is a competitive rate (5.94%) but no offset account.