Post-Conviction Relief in Florida: Rules 3.850, 3.800, and 3.853

Post-conviction relief in Florida is the set of options a convicted person has to challenge a conviction or sentence after the trial, and often after a direct appeal, has ended. Four main vehicles do the work: Rule 3.850 (motion to vacate, set aside, or correct sentence), Rule 3.800 (correction of an illegal or miscalculated sentence), Rule 3.853 (post-conviction DNA testing), and, once state remedies are exhausted, a federal habeas corpus petition under 28 U.S.C. § 2254. Each has its own grounds, its own deadline, and its own trap doors. All of the state motions are filed in the same trial court that entered the original judgment, and unlike a direct appeal, they often rely on facts or evidence that never appeared in the trial record.

Rule 3.850: The Main Vehicle for Challenging a Conviction

Rule 3.850 is where most Florida post-conviction cases live. It is available to anyone who was convicted at trial or who entered a guilty or no-contest plea, and it asks the court to vacate the judgment, set it aside, or correct the sentence. The rule lists several grounds: that the conviction or sentence violated the U.S. or Florida constitution, that the court lacked jurisdiction, that the sentence exceeded the legal maximum, that the plea was involuntary, or that the judgment is otherwise open to collateral attack.¹

Common Grounds That Actually Win

The most common claim is ineffective assistance of counsel. To win, you must clear the two-part test from Strickland v. Washington: that your attorney’s performance fell below an objectively reasonable standard, and that the errors actually changed the outcome. The second prong is where most claims fail. Showing that your lawyer made a mistake is not enough; you must show a reasonable probability the result would have been different without it.² A lawyer who never interviewed a key alibi witness, who failed to investigate an available defense, or who gave incorrect advice about the consequences of a plea can all give rise to a valid claim. Under Padilla v. Kentucky, that includes failing to warn a non-citizen client about the deportation consequences of a guilty plea; when deportation is a certainty under the law, the attorney must say so explicitly.³

Newly discovered evidence is another major ground. The evidence must be something you didn’t know about at trial and couldn’t have found through reasonable effort, and it must be strong enough that it would probably lead to an acquittal on retrial. A recanting witness or a newly surfaced document can meet the bar. Vague claims of “new information” without specifics will not.

An involuntary plea is the third workhorse ground. If you entered a guilty or no-contest plea because of coercion, a fundamental misunderstanding of the sentence you faced, or because the court failed to advise you of mandatory consequences, the plea can be challenged. The core question is whether you understood what you were giving up.

The Two-Year Deadline and Its Exceptions

Rule 3.850 imposes a strict two-year deadline for most claims. The clock starts when the judgment and sentence become final, which usually means when the direct appeal is resolved or the time to file one expires. Miss that window and the court will not reach the merits.¹

Three narrow exceptions can extend the deadline. If the facts supporting your claim were unknown and couldn’t have been found through reasonable effort, you have two years from the date you discovered them or should have. If a court recognizes a new constitutional right and declares it retroactive, you have two years from the date of that decision. And if you hired a lawyer to file a timely 3.850 motion and the lawyer simply failed to do so, you have two years after the original deadline expired.

One carve-out matters more than the exceptions: a motion claiming the sentence exceeds what the law allows can be filed at any time, with no deadline.¹ Capital cases involving a death sentence follow a separate track under Rule 3.851, with its own timeline and additional protections.

Rule 3.800: Fixing an Illegal or Miscalculated Sentence

Rule 3.800 is narrower. It addresses sentencing problems only, not the underlying conviction. Under Rule 3.800(a), a court can correct an illegal sentence at any time, fix a scoresheet calculation error, or grant proper credit for time served in jail before sentencing. The error must be apparent from the court records themselves.⁴

Scoresheet mistakes are a frequent basis. Florida’s sentencing guidelines use a point system that factors in offense severity and prior criminal history. If a prior conviction was counted twice, or if points were assigned for a charge that was actually dismissed, the resulting sentence can exceed what the law allows, and correcting the scoresheet can lead to resentencing.

Rule 3.800(b) handles sentencing errors caught while a direct appeal is still pending, letting the trial court fix the problem before the appellate court reviews the case. You cannot file under 3.800(a) during the window when a 3.800(b) motion is available or while a direct appeal is pending.⁴

Rule 3.853: Post-Conviction DNA Testing

Rule 3.853 lets a convicted person ask the court to order DNA testing on physical evidence from the investigation. The bar is high. Your motion must include a sworn statement that you are innocent, a description of the evidence to be tested and where it is located, and an explanation of why the identity of the perpetrator is genuinely disputed in the case.⁵

Before granting the request, the court looks at several things. The physical evidence must still exist. The DNA results must be the kind that would have been admissible at trial. And there must be a reasonable probability that you would have been acquitted or received a lighter sentence if the DNA evidence had been available. If the evidence was tested before, you have to show that advances in DNA technology would now produce a more definitive result than the one possible at the time of trial.⁵

The deadline for a DNA motion is separate from Rule 3.850. Generally, it must be filed within four years of the conviction becoming final or within four years after an appeal is resolved, whichever is later. If the facts supporting the petition were unknown and couldn’t have been discovered through reasonable effort, there is no deadline.

Federal Habeas Corpus After State Remedies Run Out

Once every available state remedy is exhausted, a Florida prisoner can file a federal habeas corpus petition under 28 U.S.C. § 2254. This is not a second shot at the state post-conviction case. Federal courts give heavy deference to state court decisions and will grant relief only if the state court’s ruling was “contrary to, or involved an unreasonable application of, clearly established Federal law” as determined by the U.S. Supreme Court, or was based on an unreasonable reading of the facts.⁶

Exhaustion is strictly enforced. Every federal constitutional claim must have been presented to the Florida state courts through proper channels before a federal court will consider it, and filing in federal court while state remedies remain available typically ends in dismissal.⁶ A federal habeas petition carries a one-year deadline under the Antiterrorism and Effective Death Penalty Act (AEDPA), generally running from the date the state conviction became final. If the petition is denied, you cannot appeal unless a judge issues a certificate of appealability, which requires a “substantial showing of the denial of a constitutional right.”⁷ Most are denied.

Will the Court Appoint a Lawyer?

In most non-capital post-conviction cases, no. The Sixth Amendment right to counsel applies at trial and on direct appeal, but the U.S. Supreme Court has held that post-conviction proceedings fall outside its reach. Any right to counsel in this setting is evaluated under due process and equal protection, and neither requires a state to appoint free counsel for collateral attacks on a conviction.⁸

Florida does appoint counsel for inmates on death row during capital post-conviction proceedings under Rule 3.851. For non-capital cases, most petitioners file on their own. Some Florida circuits will appoint counsel if the court orders an evidentiary hearing, but that appointment is discretionary. Standard Florida Supreme Court forms for Rule 3.850 and Rule 3.853 are available through the Clerk of the Court and prison law libraries and are designed with pro se petitioners in mind.

Preparing and Filing the Motion

The motion needs the original case number, the court division, and the exact date the sentence was imposed. Using the approved Florida Supreme Court forms for Rule 3.850 and Rule 3.853 is the easiest way to avoid leaving out a required element.

Substance decides outcomes. The statement of facts must be specific. “My lawyer was ineffective” without explaining exactly what the lawyer did wrong and how it hurt your case will be denied. A strong motion keeps factual claims separate from legal arguments: the fact might be that your attorney never contacted three witnesses you identified before trial; the legal argument explains why their testimony would likely have changed the verdict.

Every motion under Rule 3.850 or 3.853 must be signed under oath and notarized. If you are incarcerated, include a certificate of service showing when you handed the motion to prison staff for mailing, since that date counts as the filing date under the mailbox rule. Filing an incomplete or unsworn motion is one of the most common reasons courts dismiss petitions without ever reaching the merits.

What Happens After You File

The presiding judge reviews the motion first for legal sufficiency. If the court files and trial record conclusively disprove your claims, the court can issue a summary denial, often citing specific parts of the record (such as a plea colloquy transcript showing you were warned about consequences you now say you didn’t know about).¹

If the motion survives initial review, the court orders the State Attorney to file a response within a deadline the judge sets.⁹ After the state responds, the judge may set an evidentiary hearing where both sides present witnesses and evidence. This is often the most critical stage, because it is where the petitioner has to prove the facts alleged in the motion. The judge then makes factual findings and issues a final order granting or denying relief.

A successful motion can throw out the conviction entirely, order a new trial, allow a plea to be withdrawn so the case resets to its pre-plea posture, or correct the sentence. If the motion is denied, you have 30 days from the date the order is rendered to file an appeal with the appropriate Florida District Court of Appeal. Miss that 30-day window and you forfeit appellate review of the post-conviction ruling.

1
Westlaw. Florida Rules of Criminal Procedure Rule 3.850 – Motion to Vacate, Set Aside, or Correct Sentence
2
Congress.gov. Constitution Annotated – Amdt6.6.5.6 Prejudice Resulting from Deficient Representation Under Strickland
3
Justia. Padilla v. Kentucky
4
Supreme Court of Florida. Florida Rules of Criminal Procedure 3.800 – Correction, Reduction, and Modification of Sentences
5
Florida Supreme Court. Florida Rule of Criminal Procedure 3.853 – Motion for DNA Evidence Examination
6
Office of the Law Revision Counsel. 28 U.S. Code 2254 – State Custody; Remedies in Federal Courts
7
Office of the Law Revision Counsel. 28 U.S. Code 2253 – Appeal
8
Constitution Annotated. Post-Conviction Proceedings and Right to Counsel
9
Florida Supreme Court. Florida Code Rule 3.850 – Motion to Vacate, Set Aside, or Correct Sentence