What is the Difference Between a Motion to Dismiss and a Motion for Summary Judgment?

In most habeas corpus and postconviction cases, once the petition is filed and passes initial review, the court orders the government (called the respondent) to respond to the claims. But that “response” doesn’t always come in the form of an answer in opposition to your request for relief. More often, the government files a motion to dismiss or a motion for summary judgment, and sometimes both.

To someone unfamiliar with federal habeas procedure, these motions might look like formal paperwork or routine delays. They’re not. Each one is a direct attempt to end your case before the court ever looks at the merits of your claims. Understanding the difference between them, and how to respond properly, can be the deciding factor between moving forward and being dismissed.

What a Motion to Dismiss Means

A motion to dismiss challenges your petition on legal grounds. It argues that the court cannot grant you relief because of some procedural or jurisdictional defect in your filing. In other words, the government is saying, “Even if everything the petitioner claims is true, the court can’t legally to do anything about it.”

The most common reasons for a motion to dismiss are:

• Untimeliness: The petition was filed after the one-year AEDPA deadline expired.
• Waiver: The petitioner waived their right to post-conviction relief in a plea agreement.
• Procedural default: The claims were not raised properly in state court.
• Successive filing: The petition raises claims that should have been raised in the earlier motion, or were already decided in a previous motion.

Each of these issues is legal, not factual. That means the government isn’t arguing that your claims are false; it’s arguing that they can’t be heard at all.

The proper way to respond to a motion to dismiss is to either fix or defend the legal problem. If the government says your petition is late, you must show that it’s actually timely or that you’re entitled to equitable tolling (the time limit should be excused). If they raise waiver, you must explain why the waiver doesn’t apply to your specific situation. If they claim procedural default, you can argue cause and prejudice or actual innocence to overcome it. These arguments are too complex for this article and will be addressed in separate articles.

Critically, what you shouldn’t do is reargue the claims in your petition. The court won’t reach those until it decides whether your case can proceed. Responding with more details about why you’re innocent or why your lawyer was ineffective won’t help unless those details directly relate to the procedural issue raised.

What a Motion for Summary Judgment Means

A motion for summary judgment is different. This motion says, “Even if all the petitioner’s claims are true, there’s no genuine dispute of material fact, and we win as a matter of law.” It’s a way for the government to end the case without a hearing or any further effort on their part.

Where a motion to dismiss focuses on the legal ability of the court to grant relief, a motion for summary judgment focuses on facts and evidence. The government is saying that you haven’t produced enough proof to support your claims. For example, you might allege ineffective assistance of counsel but fail to include affidavits, records, or other evidence supporting that claim, and the existing record forecloses your claims. The government will then argue that there’s no factual dispute worth exploring, and the judge should rule in their favor.

Your response must therefore present facts, sworn statements, documents, declarations, or other admissible evidence from outside the existing record, to show that a genuine dispute exists. The most effective way to do this is through an affidavit or declaration under penalty of perjury, laying out specific facts supporting your claims. Many courts even require an affidavit to oppose summary judgment.

If you don’t submit one, the court may assume there are no facts in dispute and grant summary judgment to the government.

Why You Must Respond: Silence Is Surrender

Failing to respond to either a motion to dismiss or a motion for summary judgment is effectively conceding that the government is right. Bernal v. Horn, No. 2:25-cv-05715-WLH (SK), 2025 U.S. Dist. LEXIS 201659 (C.D. Cal. Oct. 10, 2025) (“By not timely opposing the motion to dismiss, Petitioner may be considered to have consented to the granting of the motion.”).

Courts have repeatedly treated silence as consent. Once a deadline passes, the court can dismiss your case without ever looking at your claims.

If you’re facing a motion and you’re not sure what to say, do not stay silent. File a request for an extension of time. Explain that you need time to prepare your response. Most courts will grant it if you show good cause and act before the deadline. Doing nothing, however, tells the court that you’ve abandoned your case, and the government will gladly take that easy win.

What Happens When the Government Doesn’t Respond

Many petitioners assume that if the government fails to respond to a habeas petition, it’s the same as when a petitioner fails to respond to a motion. It’s not.

If the government doesn’t file a response or an answer, you don’t automatically win. The court still has a duty to review your claims and decide whether they have merit. The burden remains on you to prove that a constitutional violation occurred.

However, there is an important advantage when the government fails to respond. By doing so, the government waives any affirmative defenses that it could have raised. Affirmative defenses include issues like statute of limitations (deadlines), procedural default, and failure to exhaust state remedies. Once waived, the court generally cannot raise them on its own. That means your claims will be reviewed without those procedural barriers.

This distinction is critical:

• When you fail to respond, your silence concedes the government’s position.
• When the government fails to respond, its silence only forfeits procedural defenses, not the right to have the court decide your claims on the merits.

So, while the government’s failure to respond can strengthen your position, it doesn’t guarantee relief. The court will still review the record and decide whether your claims have legal and factual support.

How to Beat These Motions

Beating a motion to dismiss or a motion for summary judgment isn’t about being a legal expert; it’s about being strategic and proactive. Here’s what works:

1. Read the motion carefully. Identify whether the issue is legal (motion to dismiss) or factual (summary judgment).
2. Note your deadline. Most courts give 14 to 30 days to respond. Don’t wait until the last minute.
3. Address the issue directly. Don’t reargue your claims; explain why the motion’s basis is wrong.
4. Provide supporting evidence. Especially for summary judgment, include affidavits, declarations, or documents that show disputed facts.
5. Ask for help early. Competent help from someone familiar with habeas procedure can save your case.
6. Always file something. A short, good-faith response is better than silence.
7. The Bottom Line

The government’s motions to dismiss and for summary judgment are powerful tools designed to shut your case down before it’s ever heard. But with a clear understanding of what these motions mean and how to respond properly, you can keep your case alive.

If you respond on time, address the issues directly, and back up your claims with facts and law, you’ve already beaten the odds that destroy most petitions before they ever get reviewed.

And remember: when the government drops the ball and fails to respond, that doesn’t mean you’ve automatically won, but it does mean their defenses are off the table, and your claims get the full weight of judicial review. Keep pushing for a win.

In habeas work, timing and precision are everything. Don’t let silence decide the outcome.