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Frank's avatar

One point that I'd like to highlight is that interest from HYSAs is taxed at your marginal tax rate for Federal and State income taxes which could reduce your after tax yield from ~5% to ~3% if you are in a high enough tax bracket. One way around the state taxes is to invest in a money market fund that is solely or mostly treasuries or treasury bills directly as interest from treasuries is not taxed at the state level which can make a huge difference on your after-tax yield. In an ideal world it would be nice to do the simple calculation of "is my debt APR lower than my savings/investing APR?" and leave it at that, but unfortunately more calculation is required due to the tax implications. A good resource I've found to help determine the best money market given your tax brackets is: https://www.bogleheads.org/forum/viewtopic.php?t=401821

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