Good vs bad Florida tax liens: what to buy, what to walk away from, and how we tell them apart
A tax certificate is only as good as the property behind it. A cheap lien on land nobody wants is not a bargain, and a "low" opening bid on a homestead can be three times higher than it looks. Below are the four checks we run on every record before it reaches you, each one shown on real Florida records.
Counts and examples come from our database as of October 3, 2026. Values are the county appraiser's assessed (just) value, not a market price. More on that at the end.
Watch: how a $107 lien pays you back
20 seconds: how a $107 lien on a real Delray Beach home pays you back. See it step by step →
First, the two things you can buy
A tax lien certificate. When a Florida owner doesn't pay property tax, the county sells a certificate for the unpaid amount. You are paying the owner's tax bill, and the owner pays you back with interest when they redeem. At the auction investors bid the interest rate down from 18%. Certificates nobody bids on stay with the county ("county-held") and can be bought later.
A tax deed. If a certificate stays unpaid for two years, its holder can apply for a tax deed. The property then goes to public auction with an opening bid that covers the certificates, interest and costs. Win the auction and you get the property.
Either way, the property is your security. If it's worthless, unusable, or carries more debt than value, the certificate is worth little too. That's what the screen checks.
Check 1 — Is there actually a building?
We read the building value straight from the county appraiser roll. If it's zero, the parcel is vacant land and we hide it. This one rule removes most of the list: 802 of 852 Palm Beach county-held certificates.
The debt is about 25 times what the land is worth. Nobody redeems that, and if you took the deed you'd pay six figures for an $8,000 lot.
This one looks great on paper, $705K behind a $2,900 lien. But there is no structure, the appraiser doesn't classify it as a home or business, and the certificate has gone unclaimed since 2019. When land that "valuable" sits unwanted for six years, there's usually a reason the numbers don't show. We don't put it in front of you.
Why vacant land is a trap: many lots are slivers, drainage strips, wetlands or landlocked parcels that can't be built on or sold. The owner has no reason to redeem, so you never collect the interest. You end up holding (or deeding) land you can't move.
Check 2 — Is it a home or a business?
Every parcel has a use code on the appraiser roll. We keep the residential and commercial codes (single-family, condo, multi-family, retail, office, warehouse and so on) and hide everything else: agricultural, government, utility, miscellaneous.
There is a structure, but the appraiser doesn't classify the parcel as a home or business, so there's no ordinary buyer for it if you end up with the deed.
A $100 certificate isn't a bargain when the whole parcel is worth $2,233.
Check 3 — How many years in a row is it unpaid?
One missed year is common: a missed bill, a move, an escrow mix-up. Three or more unpaid years on the same parcel is a different signal. We hide the parcel when it has three or more open certificates.
This is the hardest one to pass on: a homesteaded $325K home with tiny bills. But an owner who lets a $170 bill go unpaid three years running usually has something going on: an estate, a dispute, a bankruptcy, or a house they've walked away from. In Florida, to take a parcel to deed you also have to pay off every other outstanding certificate on it. It's a conservative rule and we'd rather show you fewer, cleaner records.
Check 4 — Is the property worth many times the debt?
This is the margin of safety. We add up every certificate on the parcel, not just the one you're looking at, and compare the total to the appraiser's value.
- Tax lien certificates: value must be at least 10× the total debt on the parcel.
- Tax deed sales: value must be at least 3× the real opening bid, and on homesteads the real opening bid is higher than what's listed (below).
The homestead trap in tax deed sales
When the property is a homestead, Florida adds one-half of the assessed value to the opening bid at the sale. A bid that looks cheap on the calendar can be most of the property's value by auction day.
It looks like 4× coverage. Add half the assessed value ($40,776) and the real floor is $61,332, about 1.3×. One bad roof and you're underwater.
It looks like 14×. The real floor is $36,962, about 1.7×. Hidden.
What passes — and why
Records that clear all four checks are labeled SAFE or OK:
- SAFE: passes everything and is either a homestead or worth at least 50× the debt (10× the real floor for deed sales). Owner-occupied homes tend to redeem: few people give up their house over a few hundred dollars.
- OK: passes every check, with less cushion.
A $540K owner-occupied home behind a $183 bill, about 2,957× coverage. This is what a county-held certificate should look like.
Not owner-occupied, but the value is 56× the debt, well past the 50× line.
A real structure worth over $800K on its own, and total value about 18× the opening bid.
Commercial, improved, about 19× coverage.
The whole screen on one page
| Check | Tax lien certificate | Tax deed sale | Why |
|---|---|---|---|
| On the appraiser roll? | Must match a real parcel, or it's hidden | If we can't verify the property, neither can you | |
| Building | Building value above $0 | Vacant land rarely redeems and is hard to sell | |
| Use | Residential or commercial use code | There's a normal buyer and a normal use | |
| Unpaid years | Fewer than 3 open certificates on the parcel | — | Long chains signal trouble with the owner or the title |
| Margin | Value ≥ 10× all debt on the parcel | Value ≥ 3× opening bid (+ half the assessed value if homestead) | Room for repairs, costs and surprises |
| SAFE label | Homestead, or ≥ 50× | ≥ 10× the real floor | The most cushion |
What the screen does not tell you
The screen removes the obvious losers. It doesn't replace your own due diligence:
- Assessed value isn't market value. The appraiser values property to collect tax. Real sale prices are usually higher, but not always, and not for a damaged house.
- Condition. The roll doesn't know about a fire, a hurricane or a gutted interior. Look at the property.
- Other liens and title issues. Code-enforcement liens, federal liens and title defects can survive or complicate a tax deed. Check the clerk's records.
- Records change. Certificates get redeemed and sales get cancelled. Confirm with the tax collector and the clerk before you bid.
Not legal, tax or investment advice. Verify every record with the county tax collector, clerk and property appraiser, and talk to a licensed professional before you invest.