Miami-Dade property owners should receive their 2026 Truth in Millage notice by August 24. The document, commonly called a TRIM notice, is not a tax bill. It is a proposed-tax estimate that shows the property appraiser’s values, exemptions and taxable values, plus the tax rates proposed by local authorities. For most 2026 Miami-Dade Value Adjustment Board petitions, the clerk’s portal lists September 18, 2026, as the filing deadline. The date printed on an official or amended notice should control the owner’s response.
Key takeaways
- Check five items first: property facts, market value, assessed value, exemptions and each authority’s taxable value.
- Separate a value or exemption dispute from a tax-rate objection. The Property Appraiser and Value Adjustment Board address assessments, while taxing authorities set millage rates at public hearings.
- Miami-Dade’s 2026 VAB portal lists September 18 as the general petition deadline and a $15 fee per folio as of publication.
- An informal review can resolve errors, but owners should not assume that a conversation with the Property Appraiser pauses a VAB deadline.
- A successful value challenge can change taxable value, but it does not guarantee a particular tax bill or refund.
Compliance note: This guide provides general information, not individualized legal, appraisal or tax advice. Procedures can vary by petition type and notice. Follow the dates and instructions on the official notice and current clerk materials, and consult a qualified Florida professional when the stakes or facts warrant it.
What a Miami-Dade TRIM notice actually tells you
Florida’s Truth in Millage process connects three separate decisions. The county property appraiser determines value, exemptions, classifications and assessment limitations. Local taxing authorities propose millage rates. The tax collector later sends and collects the bill. Miami-Dade’s Property Appraiser explains that the TRIM notice is an estimate of the tax bill likely to arrive in November, not a demand for payment.
That distinction matters because a higher proposed tax can come from several places. Market value may have increased. An exemption may be missing. A transfer may have changed the assessed-value baseline. A taxing authority may have proposed a different millage rate. A non-ad valorem charge may also have changed. Owners need to identify the driver before choosing a response.
Market conditions also differ sharply across the county. MFR’s analysis of Miami condo and single-family values in 2026 found a split market, while its Miami neighborhood price map shows why a countywide trend cannot replace property-specific evidence.
The five-number check
Miami Finance Review’s five-number check turns a dense notice into a focused review. Work from the property’s underlying facts to the final estimate, rather than starting with the bottom-line tax number.
| Item | What it means | What to verify | Best first contact |
|---|---|---|---|
| Property facts | The record used to describe the parcel | Living area, lot size, use, construction, condition, ownership and recent sale | Property Appraiser |
| Market value | The appraiser’s estimate of just value as of January 1, subject to Florida law | Whether comparable sales and property condition support the estimate | Property Appraiser, then VAB if unresolved |
| Assessed value | Value after applicable assessment limitations | Prior-year value, ownership changes and the correct limitation | Property Appraiser |
| Exemptions | Benefits that may reduce taxable value | Homestead and any other approved exemptions shown on the notice | Property Appraiser; use the denial notice for appeal timing |
| Taxable value and proposed tax | The value and rate used by each taxing authority | Different exemptions, proposed millage and non-ad valorem charges | Property Appraiser for value; taxing authority for rate or budget |
Property owners can use the county’s official property search to review characteristics, sales, assessments, exemptions and taxable values. The online TRIM is a useful reference, but Miami-Dade calls it a facsimile. The mailed official notice, including any amended notice, remains the controlling document.
Market value is not assessed value
This is the most common reading error. Market value is not necessarily the number on which every taxing authority applies its rate. Assessed value reflects eligible limitations. Taxable value then reflects exemptions that apply to a particular authority. That is why one parcel can show more than one taxable value.
For eligible homestead property, the Save Our Homes limitation generally caps annual growth in assessed value at the lower of 3 percent or the change in the Consumer Price Index, subject to Florida law. The cap does not prevent market value from moving more quickly. It also does not mean the total tax estimate can rise by only 3 percent. Rates, exemptions and non-ad valorem assessments can change independently. The Florida Department of Revenue publishes the annual limitation information.
A change of ownership can also affect the assessment baseline in the following tax year. Owners comparing a new purchase with a neighbor’s long-held homestead should therefore avoid treating different assessed values as proof of an error. For broader context, see MFR’s county-level review of Florida home prices in 2026 and its analysis of the proposed 2026 property-tax constitutional amendment. That proposal should not be confused with benefits already shown on a 2026 TRIM notice.
How to reproduce the tax estimate
A mill is $1 of tax for each $1,000 of taxable value. The core arithmetic is:
Taxable value divided by 1,000, multiplied by the proposed millage rate.
Consider an illustrative parcel with a $600,000 market value, a $420,000 assessed value and a $370,000 taxable value for one authority. If that authority proposes 7.5000 mills, the estimated ad valorem tax for that line is:
$370,000 / 1,000 x 7.5000 = $2,775.
This is an MFR calculation for illustration, not a tax quote. Repeat the calculation using each authority’s taxable value and proposed rate, then account separately for non-ad valorem assessments. A homestead exemption can apply differently across authorities, which is one reason the taxable values may not match.
| Illustrative change | Calculation at 7.5000 mills | Estimated effect for that authority |
|---|---|---|
| $10,000 lower taxable value | $10,000 / 1,000 x 7.5 | $75 lower proposed ad valorem tax |
| $25,000 lower taxable value | $25,000 / 1,000 x 7.5 | $187.50 lower proposed ad valorem tax |
| $50,000 lower taxable value | $50,000 / 1,000 x 7.5 | $375 lower proposed ad valorem tax |
The economic decision is larger than property tax alone. Insurance, association expenses and maintenance all affect ownership cost. MFR’s work on Florida homeowners insurance and carrying costs explains that wider framework.
Three response lanes: record, value or rate
1. Correct the record
Begin with objective facts. Compare the official property record with closing documents, surveys, permits and the property’s actual condition. A wrong square-footage figure, incorrect building characteristic, unrecorded demolition or ownership mismatch can distort later calculations. Save a copy of the notice and record the folio number before contacting the office.
Miami-Dade encourages an informal assessment review. Owners can use the Property Appraiser’s appeal and review page or call 305-375-4712. The office says responses to submitted inquiries generally take three to five business days. That service target is not a filing-deadline extension.
2. Challenge value, classification or a denied benefit
If a value issue remains unresolved, a property owner can petition the Miami-Dade Value Adjustment Board. The 2026 Miami-Dade VAB portal lists September 18, 2026, as the petition deadline and a $15 filing fee per folio as of publication. It also explains the limited filing exceptions for certain contiguous parcels or condominium units. The petition should go to the local VAB clerk, not the Florida Department of Revenue.
Exemption, classification, portability and other denials can have different notice dates and filing rules. Use the deadline on the applicable denial or amended notice. A general September 18 reminder should not replace the specific notice received by the taxpayer.
3. Respond to the proposed rate or budget
The VAB does not set a taxing authority’s millage rate. If the concern is the rate, budget or proposed spending, the relevant forum is the public hearing listed on the TRIM notice. The notice shows the date, time and location for each authority’s hearing. Non-ad valorem assessments are service charges rather than value-based property taxes, so the notice or responsible authority should be consulted for the correct review procedure.
Building a useful evidence file
A successful petition depends on the issue and evidence, not on the size of the proposed increase alone. Owners should focus on information tied to the January 1, 2026, assessment date and the characteristics of the subject property.
- The official TRIM notice and folio number.
- The county property record and any documents showing a factual error.
- Three to five genuinely comparable sales, with differences in location, size, age, condition and property type explained.
- Dated photographs of material condition issues.
- Contractor estimates or engineering records that help quantify condition, without assuming repair cost equals value loss.
- A recent certified appraisal, if the cost and complexity justify it.
- A concise calculation showing the requested value and its basis.
A listing price, automated estimate or neighbor’s tax bill can be a lead, but none is a complete analysis by itself. A condo sale with a different view, floor, renovation status or special assessment may require substantial adjustment. Likewise, a single-family comparable from a different flood zone or micro-market may be weak evidence.
Evidence exchange changed for the 2026 cycle
Florida’s 2025 legislation changed parts of the VAB evidence-exchange process, and the Department of Revenue was still updating implementing rules during 2026. The department’s official rule-development page says the amended law requires the property appraiser to provide evidence to a petitioner at least 15 days before the hearing and removes the former requirement for a written taxpayer request.
Owners should not rely on an older web article or prior-year checklist for the full procedure. Follow the current Miami-Dade portal, the clerk’s hearing notice and the newest state forms. The Department of Revenue’s property-tax forms page currently lists the PT-101 taxpayer guide, DR-486 petition and a supplemental notice covering the required exchange of evidence.
What happens after filing
The clerk schedules the matter and provides hearing instructions. Preserve confirmation numbers, payment records and every notice. Upload or deliver evidence by the stated deadlines and in the required format. Florida now provides for notice of remote-hearing rights under the amended law, but the owner’s hearing notice should be treated as the operational guide.
A pending petition does not eliminate the obligation to pay required taxes. The Florida Department of Revenue warns that taxpayers with a petition pending at delinquency generally must pay all non-ad valorem assessments and the required portion of ad valorem taxes. Owners facing a pending petition near the payment deadline should verify the current amount and timing with the tax collector or qualified counsel.
A practical 2026 timeline
| Date or period | Action |
|---|---|
| July 1, 2026 | Miami-Dade released preliminary certification data; owners could begin reviewing online assessments. |
| By August 24, 2026 | Miami-Dade says TRIM notices are sent by this date. |
| Immediately after receipt | Run the five-number check, preserve the notice and request informal review if needed. |
| September 18, 2026 | General Miami-Dade VAB petition deadline listed by the 2026 clerk portal. Follow a later controlling date only if an official amended notice provides one. |
| September and October | Taxing authorities hold budget and millage hearings listed on the notice. |
| November | The tax collector generally mails the actual property-tax bill. |
Frequently asked questions
What is a TRIM notice in Miami-Dade?
It is the annual Notice of Proposed Property Taxes. It shows assessed and taxable values, exemptions, proposed millage rates, estimated taxes and public-hearing information. It is not the final tax bill.
When is the 2026 Miami-Dade VAB petition deadline?
The 2026 Miami-Dade clerk portal lists September 18, 2026, as the general deadline. Use the deadline printed on the official notice or an official amended notice when it differs.
Does calling the Property Appraiser protect the VAB deadline?
Do not assume it does. An informal review may resolve an error, but owners should separately preserve any petition deadline shown on the controlling notice.
Can I appeal because the proposed tax is too high?
The process depends on the cause. Value, classification and exemption issues may belong with the Property Appraiser and VAB. A proposed millage rate or budget concern belongs at the public hearing for the taxing authority. Non-ad valorem charges may require contacting the responsible authority.
How much does a Miami-Dade VAB petition cost in 2026?
The 2026 online portal lists a $15 filing fee per folio as of publication. Special parcel groupings have separate procedures and fee instructions.
Does a lower market value guarantee a lower total bill?
No. The effect depends on assessed value, exemptions, the taxable value used by each authority, millage rates and non-ad valorem charges. The calculation should be repeated line by line.
Methodology: MFR reviewed Miami-Dade Property Appraiser guidance, the Miami-Dade Clerk’s 2026 VAB portal, current Florida Department of Revenue taxpayer materials and 2025 legislative rule-development notices. The calculation tables are original MFR illustrations and do not use an individual taxpayer’s data. Official pages were checked on August 3, 2026.
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Miami Finance Review produces independent editorial analysis. Figures are attributed to their sources and independently cross-checked where possible. This content is informational and is not investment, legal, tax or lending advice.
