Explainer
The Advertised Interest Rate Is Not Your Guaranteed Return

A maximum is not a promise
Marketing often quotes the highest rate a law allows. In many auctions, bidders compete by bidding that rate down, by paying premiums, or by other methods. The rate you actually receive — if you receive one — depends on the local bidding method and the outcome.
Some systems also apply minimum charges or penalties that change the effective result when redemption happens quickly. These rules are statutory and specific to each state; check the official text rather than a summary.
Costs reduce the result
A realistic estimate subtracts everything you pay to participate:
- Registration, platform or deposit-related costs
- Recording, administrative and application fees
- Your time, research tools and any professional advice
- Costs of pursuing a deed if the certificate is not redeemed
Timing and uncertainty
You generally do not control when — or whether — a certificate is redeemed. Money can be tied up longer than expected, and some certificates may become difficult or impossible to collect. Use our free Cost & Return Calculator to test your own hypothetical assumptions, including scenarios that lose money.
Educational information only — not legal, tax or investment advice. Rules vary by state and county; confirm with official sources and qualified professionals.