Yes, you can appeal a criminal sentence, but only if you can point to a specific legal error — an illegal sentence, a miscalculated guideline range, an abuse of discretion, a constitutional violation, or ineffective assistance of counsel. Disagreeing with the length of the sentence is not enough. The appeal goes to a higher court that reviews the record from your sentencing hearing; no new evidence is heard and no witnesses testify. In federal court, you have 14 days from sentencing to file the notice of appeal, and the process takes roughly 11 months on average.
Grounds That Actually Work
Federal law spells out when a defendant may appeal a sentence. Under 18 U.S.C. § 3742, the sentence must have been imposed in violation of law, resulted from an incorrect application of the sentencing guidelines, exceeded the guideline range, or — where no guidelines apply — been plainly unreasonable.1Office of the Law Revision Counsel. 18 USC 3742 – Appeal of a Sentence State statutes differ, but the logic is similar: you need a concrete legal error.
The clearest ground is a sentence that exceeds the legal maximum. If the statute caps punishment at 10 years and the judge imposed 11, that sentence is illegal on its face.2United States Sentencing Commission. Amendment 767 – Sentencing on Multiple Counts of Conviction These errors are rare, but appellate courts correct them quickly when they appear.
More common are guideline errors. Federal guidelines produce a recommended range based on the offense level and the defendant’s criminal history. If the judge applied the wrong offense level or missed a relevant adjustment, the resulting sentence may be unlawfully inflated. The guidelines have been advisory since the Supreme Court’s 2005 decision in United States v. Booker, but a judge who departs from them must explain the reasons on the record.3United States Sentencing Commission. Simplification Draft Paper – Departures
Abuse of discretion covers sentences that were arbitrary or driven by improper factors. A sentence influenced by a defendant’s race, religion, or political beliefs violates constitutional protections. In Apprendi v. New Jersey, the Supreme Court also held that any fact increasing a sentence beyond the statutory maximum must be found by a jury beyond a reasonable doubt, not decided by the judge at sentencing.4Constitution Annotated. Increases to Minimum or Maximum Sentences and Apprendi Rule
Constitutional defects at sentencing are their own category. A sentence grossly disproportionate to the crime can violate the Eighth Amendment’s ban on cruel and unusual punishment.5Congress.gov. U.S. Constitution – Eighth Amendment Denial of the right to counsel at sentencing can invalidate the entire proceeding.
Ineffective Assistance of Counsel
If your attorney’s performance at sentencing was so poor that it changed the outcome, that failure can support a challenge. Under Strickland v. Washington, you must show two things: your lawyer’s mistakes were objectively unreasonable, not just a strategic choice you disagree with, and there is a reasonable probability the sentence would have been different without those mistakes.6Justia. Strickland v. Washington Examples include failing to investigate mitigating evidence, missing an obvious guideline argument, or neglecting to object to factual errors in the presentence report. The bar is deliberately high. Courts presume counsel acted competently, and you carry the burden of proving otherwise.
Whether a Plea Waiver Blocks You
Most criminal convictions come from plea agreements, and many of those agreements include a waiver of the right to appeal. Federal and state courts overwhelmingly enforce these waivers when the defendant agreed to them knowingly and voluntarily. Filing an appeal in defiance of a valid waiver can be treated as a breach of the plea deal: the prosecution can void the agreement, revive the original charges, and pursue a harsher sentence the second time around.
Waivers have limits. Most circuits recognize exceptions for a sentence imposed in violation of law, an involuntary plea, or constitutionally ineffective counsel. Under 18 U.S.C. § 3742(c), a defendant who agreed to a specific sentence can still appeal if the judge imposed something greater than the agreement called for.1Office of the Law Revision Counsel. 18 USC 3742 – Appeal of a Sentence Read your plea agreement carefully, or have a different attorney read it, before deciding to file.
The Filing Deadline
In federal criminal cases, you have 14 days from entry of the judgment or sentencing order to file the notice of appeal.7Legal Information Institute. Federal Rules of Appellate Procedure Rule 4 – Appeal as of Right, When Taken Missing that window can permanently forfeit your right to a direct appeal. There is no grace period, and extensions after the deadline are rare.
The notice itself is a short document filed with the clerk of the trial court where you were sentenced, not with the appellate court. It must name the party appealing, identify the judgment being challenged, and specify the court to which the appeal is taken.8Office of the Law Revision Counsel. Federal Rules of Appellate Procedure Rule 3 – Appeal as of Right, How Taken Courts are forgiving about informality in the notice; they are not forgiving about the date.
State deadlines are generally longer but vary widely. Many states allow 30 days for a criminal notice of appeal; others allow 60 or 90. Confirm the exact timeframe with the trial court clerk’s office immediately after sentencing.
How the Appeal Unfolds
Once the notice is filed, the trial court assembles the official record: every document, motion, and hearing transcript. Transcript preparation alone can take weeks. After the record is filed, the appellant has 40 days for an opening brief, the government has 30 days to respond, and the appellant gets 21 days for a reply.9Legal Information Institute. Federal Rules of Appellate Procedure Rule 31 – Serving and Filing Briefs The briefs are the heart of the appeal. The opening brief identifies the legal errors and explains why the sentence should be overturned or reduced; the government’s response defends it. Extensions are common, which is part of why appeals take as long as they do.
A panel of three appellate judges then reviews the case. Oral argument happens unless all three judges unanimously conclude it is unnecessary because the appeal is frivolous, the legal issue is settled, or the briefs adequately present the case.10Legal Information Institute. Federal Rules of Appellate Procedure Rule 34 – Oral Argument Many criminal sentence appeals are decided on the briefs alone. The panel issues a written opinion explaining its decision.
The median federal criminal appeal took 10.8 months from notice to final decision, based on data covering the 12-month period ending September 2024.11U.S. Courts. Table B-4A – Median Time Intervals for Civil and Criminal Appeals Complex cases and heavier-caseload circuits run longer. State appellate timelines often run 12 to 18 months or more.
Custody During the Appeal
Filing an appeal does not pause your sentence. In federal court, the default is detention. To be released pending appeal, you must show by clear and convincing evidence that you are not a flight risk and not a danger to the community, and you must show that your appeal raises a substantial legal question likely to result in reversal, a new trial, or a meaningfully reduced sentence.12Office of the Law Revision Counsel. 18 USC 3143 – Release or Detention of a Defendant Pending Sentence or Appeal That second requirement is where most requests fail; you are asking the court to agree your appeal has real merit before the appellate court has reviewed it.
For defendants convicted of violent crimes, drug offenses carrying a maximum of 10 years or more, or certain other serious charges, detention is mandatory regardless of the appeal’s strength. State rules on custody during appeal vary, but the general principle is the same: release is the exception.
What It Costs
The federal docketing fee is $605, which is $600 plus a $5 statutory fee.13U.S. Courts. Court of Appeals Miscellaneous Fee Schedule Trial transcripts, which the appellate court needs to review the record, typically cost between $4.50 and $7.00 per page, and a multi-day sentencing hearing can produce hundreds of pages. Attorney fees for handling an appeal often run into the thousands.
If you cannot afford these costs, you can apply to proceed in forma pauperis, asking the court to waive the fees. In federal court, you file a motion in the district court with an affidavit showing financial hardship. If the trial court already determined you were too poor to hire your own lawyer, you generally qualify automatically, unless the court certifies your appeal is not taken in good faith.14United States Court of Appeals for the Fourth Circuit. Rule 24 – Proceeding in Forma Pauperis
Right to an Appointed Lawyer
If you cannot afford counsel, you have a constitutional right to an appointed attorney for your first appeal. In Douglas v. California, the Supreme Court held that denying a poor defendant a lawyer on the first appeal of right, while wealthier defendants can hire one, violates the Fourteenth Amendment’s equal protection guarantee.15Justia. Douglas v. California, 372 U.S. 353 The right applies to the first direct appeal only, not to discretionary appeals to a state supreme court or to post-conviction proceedings.
There is a caveat. If your appointed appellate attorney reviews the record and finds no non-frivolous issues, they can file an Anders brief identifying anything that might arguably support the appeal and ask to withdraw. You then get a chance to file your own brief. The appellate court independently reviews the record before deciding whether the appeal truly lacks merit.
Possible Outcomes
Appellate courts affirm the original sentence far more often than they overturn it. Federal data from 2015 showed that about 6.9% of criminal appeals resulted in reversals.16U.S. Courts. Just the Facts: U.S. Courts of Appeals That figure covers all criminal appeals, not just sentencing challenges, but it gives a realistic sense of the odds.
When a court does find error, the typical remedy is to vacate the sentence and send the case back for resentencing, called “reverse and remand.” A resentencing is a fresh proceeding, and it can produce a harsher sentence, not just a lighter one. The Supreme Court has held there is no absolute constitutional bar to a more severe sentence after a successful appeal, so long as the increase is not motivated by vindictiveness against the defendant for having appealed. If the judge does impose a longer sentence, the reasons must appear on the record and rest on objective information.17Justia. North Carolina v. Pearce, 395 U.S. 711
In rare cases, the appellate court modifies the sentence directly without a remand. This happens when the error is purely mathematical or technical, such as a miscalculated guideline range, and there is nothing for the trial court to reconsider.
If the Direct Appeal Fails
Losing a direct appeal does not end every option. In federal court, a defendant can file a motion under 28 U.S.C. § 2255 asking the sentencing court to vacate, set aside, or correct the sentence. This post-conviction remedy is separate from the direct appeal and is available when the sentence was imposed in violation of the Constitution or federal law, the court lacked jurisdiction, or the sentence exceeded the legal maximum.18Office of the Law Revision Counsel. 28 USC 2255 – Federal Custody, Remedies on Motion Attacking Sentence
The deadline is one year from the date the conviction becomes final, which typically means one year after the direct appeal concludes or the time to appeal expires. Limited exceptions can extend or restart the clock: government action that prevented filing, a newly recognized constitutional right made retroactive by the Supreme Court, or newly discovered facts that could not have been found earlier with reasonable diligence.18Office of the Law Revision Counsel. 28 USC 2255 – Federal Custody, Remedies on Motion Attacking Sentence State courts have their own post-conviction procedures with their own deadlines. These remedies are narrower than a direct appeal and harder to win, but some claims — ineffective assistance of counsel is the common example — are hard to raise on direct appeal because the record does not yet contain the evidence needed to prove them.