KEY TAKEAWAYS
- There is no draft today. Restarting one would take a new act of Congress signed by the President; registration only keeps a list ready.
- If a draft were held, Selective Service would sort men into classes. Being found medically, mentally or administratively unfit puts you in Class 4-F, not acceptable for service.
- The medical rules are the same ones used for enlistment: DoD Instruction 6130.03, Volume 1, currently Change 6, effective February 3, 2026.
- Other men can be exempted or deferred, including ministers, sole surviving sons in peacetime, men whose families depend on them, conscientious objectors and some elected officials. None of these excuse you from registering.
- Registration becomes automatic for men under the FY2026 defense law starting in December 2026, but the rules to run it aren’t final. Men turning 18 should keep registering at SSS.gov.
- What Disqualifies You From the Draft: The Quick List
- How a Draft Would Work
- Automatic Registration: What Changes in December 2026
- Medical Disqualifications
- Non-Medical Reasons You Could Be Found Unfit
- Conscientious Objectors
- Deferments and Postponements
- Who Doesn’t Have to Register
- Penalties for Not Registering
- Frequently Asked Questions
Interest in what keeps someone out of a draft spikes every time there is talk of war. The answer is more specific than most of what circulates online. There is no draft now, and only Congress can start one. But the system that would run it is fully written down: who would be called first, how each man would be classified, and which medical, family and legal circumstances would keep him from serving.
This page lays out those rules as they stand in 2026, using the Selective Service regulations in 32 CFR Part 1630, the Military Selective Service Act and the Defense Department’s medical standards for enlistment and induction.
What Disqualifies You From the Draft: The Quick List
If a draft started, each registrant called up would be placed in a class. The ones that keep a man from being inducted are below, from the Selective Service classification rules:
| Class | Who it covers | Exempt or deferred? |
|---|---|---|
| 4-F | Found not acceptable for service under the Defense Department’s physical, mental or administrative standards | Not inducted |
| 4-G | Sole surviving son or brother: a parent or sibling was killed in action or died in the line of duty after December 31, 1959, or is captured or missing | Exempt in peacetime only, not during a war or national emergency declared by Congress |
| 4-D | Ordained or regular ministers of religion | Exempt |
| 2-D | Students preparing for the ministry | Deferred while studying |
| 3-A | Men whose induction would cause extreme hardship to a spouse, children, parents or other dependents | Deferred |
| 4-B | Certain officials elected statewide, members of Congress and state legislatures, and judges of courts of record | Deferred while in office |
| 4-A | Men who have already completed military service, generally at least six months of honorable active duty | Exempt |
| 1-C | Current members of the armed forces, NOAA Corps and Public Health Service, including service academy cadets and midshipmen | Not drafted (already serving) |
| 1-D-D / 1-D-E | Certain reservists, ROTC and officer-program students, and Delayed Entry Program enlistees | Deferred or exempt |
| 1-A-O | Conscientious objectors to combat only | Drafted for noncombatant service |
| 1-O | Conscientious objectors to all military service | Ordered to civilian alternative service |
| 4-C / 4-T | Some dual nationals and aliens covered by treaties | Exempt |
Everyone not in one of these classes would be 1-A: available for military service. Two points matter. First, every one of these classes is decided only after a draft is authorized and a man is called; none can be claimed in advance. Second, none of them excuse you from registering.
How a Draft Would Work
The U.S. has relied on volunteers since 1973. To bring back a draft, Congress would have to pass a law and the President would have to sign it. Selective Service then runs a national lottery that pairs every birth date with a sequence number. Men turning 20 that year are called first, then those turning 21, and so on through 25; younger men are reached only after that. Our guide to how the draft lottery works walks through each step.
Men called in order would get an induction notice and report to a Military Entrance Processing Station (MEPS) for the same medical, aptitude and background screening that enlistees go through. Those found qualified and not entitled to an exemption or deferment would be inducted. Claims for a different classification — hardship, ministry, conscientious objection and the rest — would be filed after the notice and decided by local and appeal boards.
Can you be drafted at 30, 40 or 45?
No. Under the Military Selective Service Act, the men liable for induction are those between 18 years 6 months and 26 at the time of registration (50 U.S.C. 3803). Registration itself ends at 26. A man in his 30s or 40s is outside the draft entirely, though he can still volunteer up to each branch’s enlistment age limit — see our military age limits by branch.
Automatic Registration: What Changes in December 2026
Section 535 of the National Defense Authorization Act for Fiscal Year 2026, signed December 18, 2025, moves the job of registering from young men to the government. It takes effect one year after enactment. Selective Service must try to register every male resident ages 18 through 25 using data from other federal agencies.
The rules to carry it out aren’t final. Selective Service sent proposed regulations to the White House Office of Information and Regulatory Affairs in March 2026 and withdrew them on July 23, 2026. Until a working system is announced, men should keep registering themselves within 30 days of turning 18 at SSS.gov. Our Selective Service registration guide tracks the change.
The new law changes who does the paperwork, not who has to register or who could be drafted. It still covers men only; our article on whether women can be drafted explains why.
Medical Disqualifications
A man found medically unfit is classified 4-F. The standard is the same one that decides who can enlist: DoD Instruction 6130.03, Volume 1, “Medical Standards for Military Service: Appointment, Enlistment, or Induction.” The current version is Change 6, effective February 3, 2026. It runs through every body system; the conditions people ask about most are below.
| Area | What is disqualifying (summary) |
|---|---|
| Vision | Distant vision that can’t be corrected with glasses to at least 20/40 in each eye; near vision that can’t be corrected to 20/40 in the better eye |
| Hearing | A current threshold in either ear above 25 dB averaged at 500, 1000 and 2000 Hz; above 30 dB at any one of those; above 35 dB at 3000 Hz; or above 45 dB at 4000 Hz |
| Asthma | A history of asthma, reactive airway disease or exercise-induced bronchospasm after the 13th birthday |
| Diabetes | Any history of diabetes mellitus; also pre-diabetes that hasn’t resolved in the last 24 months |
| ADHD | Disqualifying if, for example, medication was prescribed in the last 24 months, an IEP, 504 plan or work accommodations were needed after age 14, or there are other mental health conditions |
| Depression | Disqualifying if treated or symptomatic in the last 36 months, if outpatient care lasted more than 12 cumulative months, or with any hospital stay, recurrence or suicidality |
| Bipolar and psychotic disorders | Any history of bipolar disorder, schizophrenia or other disorders with psychotic features |
| Suicide risk | Any suicide attempt or gesture, suicidal ideation with a plan, or any suicidal ideation in the last 12 months |
| Eating disorders | Any history of an eating disorder |
This is a summary, not the full rule. The instruction lists dozens of other conditions, and the details — time periods, treatment history, whether a condition has resolved — decide the outcome. Color vision standards are set by each service.
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Military hearing standards
Hearing is one of the most-searched areas because the thresholds are precise. Any one of the limits in the table above, in either ear, is disqualifying under paragraph 6.6 of the instruction. Hearing aids don’t change the measurement. For veterans who developed hearing loss in service, our VA hearing loss rating guide covers the other side of the issue: how VA rates it.
Does a medical condition always keep you out?
For people trying to enlist, no: each service can grant waivers for many conditions on the list, and many recruits serve with one. In a draft the question is framed differently. A registrant is classified 4-F only if the Defense Department finds him not acceptable under its standards, and if a further examination is justified, he isn’t placed in 4-F until it is done. How freely waivers would be granted in a draft would depend on how many people the military needed.
Either way, honesty matters. Concealing a condition at MEPS is fraudulent enlistment, which can lead to a discharge under other-than-honorable conditions later. Our guide to the types of military discharges explains what that costs.
Non-Medical Reasons You Could Be Found Unfit
Class 4-F also covers men who fail the Defense Department’s mental or administrative standards, not just medical ones. In practice that means the same screens enlistees face: the aptitude test, and moral and administrative standards that look at criminal records and similar issues. The exact cutoffs a wartime draft would use aren’t fixed in the Selective Service regulations; the Secretary of Defense would apply the standards in force at the time.
Conscientious Objectors
A conscientious objector is a man whose religious, ethical or moral beliefs make him opposed to taking part in war. The regulations recognize two classes:
- 1-A-O: opposed to combat training and service but willing to serve in a noncombatant role in the military.
- 1-O: opposed to all military service. A man in 1-O can be ordered to perform civilian alternative service (Class 1-W) — work that contributes to national health, safety or interest — generally for 24 months.
A claim can only be filed after a draft starts and you receive an induction notice; Selective Service has no way to classify anyone in advance. Objectors still have to register. If you hold these beliefs, writing them down now and keeping records can help support a future claim.
Deferments and Postponements
Some circumstances delay induction rather than prevent it. Under 50 U.S.C. 3806(i):
- High school students can have induction postponed until they graduate, turn 20, or stop attending full time, whichever comes first. If a student turns 20 during his last year, the postponement runs to the end of that year.
- College students can have induction postponed until the end of the current semester or term, or until the end of the academic year if they are seniors.
There is no Vietnam-style student deferment for the length of a degree. Hardship to dependents (3-A) and ministry study (2-D) are deferments that last as long as the circumstance does.
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Sole surviving son
The sole surviving son rule is narrower than its name. Class 4-G covers a man whose parent or sibling was killed in action or died in the line of duty after December 31, 1959, or is captured or missing in action. It applies only in peacetime; during a war or national emergency declared by Congress, it doesn’t protect anyone (50 U.S.C. 3806(o)).
Who Doesn’t Have to Register
Almost all men ages 18 through 25 who are U.S. citizens or immigrants must register, including Guard and Reserve members not on active duty, men with disabilities who can function in public, dual nationals, refugees and undocumented immigrants. Selective Service’s own Who Needs to Register chart lists the exceptions:
- Men on current nonimmigrant visas, including H-2A seasonal agricultural workers
- Men on full-time active duty, and cadets and midshipmen at the service academies and Coast Guard Academy (to be fully exempt, you must have been on active duty or confined continuously from 18 to 26)
- Men who are hospitalized, institutionalized or incarcerated, who must register within 30 days of release if they are still under 26
- Men continually confined to a residence, hospital or institution
- Immigrants who first entered the U.S. or kept lawful nonimmigrant status until after age 26
Some exemptions people assume aren’t real. Clergy, ministry students and conscientious objectors must register; any exemption would be claimed only if drafted. Veterans who separate before 26 must register within 30 days of release.
Penalties for Not Registering
Failing to register when required is a felony punishable by a fine of up to $250,000, up to five years in prison, or both, and the same applies to anyone who knowingly helps a man avoid registering. According to Selective Service, men who don’t register may also lose eligibility for:
- Most federal jobs
- Job training under the Workforce Innovation and Opportunity Act
- U.S. citizenship, for immigrant men
- State-funded student aid and state jobs in many states
Federal student aid is no longer on that list; registration stopped being a requirement for it under the FAFSA Simplification Act. Men who are under 26 and missed the 30-day window can still register late at SSS.gov, which is far better than not registering at all.
RELATED READING
Selective Service Registration Guide 2026 →
How to register, the automatic registration change and what happens after 26.
Military Age Limits 2026: Maximum Enlistment Age by Branch →
The age rules for volunteering, which are separate from the draft.
What new enlistees and draftees would be paid at each rank.
Frequently Asked Questions
A man is classified 4-F, not acceptable for service, if the Defense Department finds he doesn’t meet its physical, mental or administrative standards. The medical standards are in DoD Instruction 6130.03, Volume 1, and include conditions such as uncorrectable vision worse than 20/40, hearing loss beyond set limits, asthma after age 13, diabetes, bipolar or psychotic disorders and recent depression. Others can be exempted or deferred, including ministers, sole surviving sons in peacetime and men whose dependents would face extreme hardship.
Exemptions and deferments include Class 4-D for ministers, 4-G for sole surviving sons in peacetime, 3-A for hardship to dependents, 4-A for men who have completed military service, 4-B for certain elected officials and judges, 1-C for current service members, and conscientious objector classes 1-A-O and 1-O. All are decided only if a draft is held, and none excuse you from registering.
No. There has been no draft since 1973, and restarting one would require Congress to pass a law and the President to sign it. What changes in 2026 is registration: the FY2026 defense law makes registration automatic for men starting in December 2026, though the rules to run it aren’t final.
No. The Military Selective Service Act limits draft liability to men between 18 years 6 months and 26 at the time of registration, and registration itself ends at 26. A man in his 30s or 40s can’t be drafted.
Under DoD Instruction 6130.03, Volume 1, a current hearing threshold in either ear above 25 dB averaged at 500, 1000 and 2000 Hz, above 30 dB at any one of those frequencies, above 35 dB at 3000 Hz or above 45 dB at 4000 Hz is disqualifying for enlistment or induction.
Yes. Conscientious objectors must register like everyone else. A claim for conscientious objector status can only be filed if a draft starts and you receive an induction notice. Objectors to combat only are classified 1-A-O for noncombatant service; objectors to all military service are classified 1-O and can be assigned civilian alternative service.
Not simply for being an only son. Class 4-G covers a man whose parent or sibling was killed in action or died in the line of duty after 1959, or is captured or missing. It applies only in peacetime, not during a war or national emergency declared by Congress.
It is a felony punishable by a fine of up to $250,000 and up to five years in prison. Men who don’t register may also be ineligible for most federal jobs, federal job training, U.S. citizenship for immigrants, and state student aid and jobs in many states. Men under 26 can still register late at SSS.gov.
This article is provided by USMilitary.org, an independent educational resource. We are not affiliated with the Selective Service System, the Department of Defense or any government agency. Draft rules are set by law and could change if Congress authorized a draft; check SSS.gov for official information.
