How to compare cash returns after tax
A practical process for putting APY and seven-day yield on the same footing, separating taxable income from exempt income, checking fees and access, and reading the result as an estimate.
Product comparisons
SPAXX vs. FDLXX
How state taxes can change what you keep from two Fidelity cash funds.
VANGUARD · TREASURY VS. FEDERALVUSXX vs. VMFXX
Compare Vanguard’s Treasury and Federal money market funds after state taxes.
MUNICIPAL FUNDS · TAXABLE SAVINGSMunicipal money market vs. HYSA
A lower headline yield can go further when some income is tax-exempt. Compare the actual dollars.
ROBINHOOD · THE COST OF GOLDRobinhood Gold cash vs. HYSA
See whether the interest advantage covers the subscription cost at your cash balance.
How these guides are maintained
Every rate table comes from the same reviewed dataset as the calculator. Each quote keeps its source date, and each guide identifies where prior-year tax percentages or incomplete evidence limit the example. Rates are reviewed three times a week; a failed check does not silently turn an old quote into a current one.
Read the calculation methodology, check the data update log, or report a source or calculation problem.