How Old to Get a Tattoo in Missouri With Parental Consent?

In Missouri, you have to be 18 to get a tattoo on your own. If you’re under 18, you can still get tattooed with parental consent, but the rules are strict: a parent or legal guardian has to give written, informed consent in person at the shop while the tattoo artist or an employee is there to witness it. That’s the short answer to how old you have to be to get a tattoo in Missouri with parental consent, and the rest of this article walks through what “consent” actually has to look like, who qualifies to give it, and what happens if a shop cuts corners.¹

Is There a Minimum Age for a Tattoo With Parental Consent?

No. Missouri’s statute doesn’t set a floor. A 17-year-old and a 12-year-old face the same legal test: written parental consent, given in person. That doesn’t mean a shop will tattoo a young child. Studios set their own internal age policies and routinely decline minors below a certain age even when a parent is standing right there. The law tells you what’s allowed; the shop decides what it’s willing to do.

There is also no judicial workaround. A judge cannot authorize a tattoo in place of a parent, and no other adult, however close to the family, can substitute for a parent or legal guardian. If the parent or guardian won’t sign, the tattoo doesn’t happen legally in Missouri.¹

One more age rule cuts the other direction: nobody under 18 can perform a tattoo on another person in Missouri. So both sides of the chair have to clear the age threshold, though only the client’s side has a consent workaround.¹

What Parental Consent Has to Look Like

The statute has three requirements, and all three have to be satisfied. The consent must be written. It must be informed. And the parent or legal guardian must sign it in person at the shop, in the presence of the practitioner or an employee.¹

That last piece is where people most often expect flexibility and don’t get any. A phone call from a parent isn’t consent. A text message isn’t consent. A notarized permission letter sent along with the minor isn’t consent. The parent has to physically be at the shop. If you’re a parent who can’t make the appointment, the appointment has to move.

Who Qualifies as a Parent or Guardian

The statute uses “parent or legal guardian.” A stepparent without legal guardianship, an older sibling, an aunt or uncle, or a family friend doesn’t qualify, no matter how involved they are in raising the minor. Anyone who lies about being a minor’s parent or guardian to get a consent form approved commits a Class B misdemeanor under the same statute. That’s a separate offense from any consequence to the shop.¹

What the Informed Consent Form Discloses

“Informed” is not a formality. Missouri’s administrative rules require the practitioner to explain specific medical risks and contraindications, both verbally and in writing, before starting any tattoo. For a minor, the parent signs the same form and is walked through the same disclosures on the child’s behalf.²

The disclosures cover:

Kidney or liver problems, which raise infection and healing risks.
Diabetes, which slows healing and raises infection risk.
Any jaundice within the previous 12 months.
Use of blood-thinning medications, which increase bleeding during the procedure.
Medications or treatments that weaken the immune system.

The practitioner also has to tell the client (or the consenting parent) that a tattoo should be considered permanent and that removal is a surgical procedure that can leave permanent scarring and disfigurement. The signed form stays on file at the shop.²

Consent Doesn’t Override the Intoxication Rule

Missouri law separately prohibits tattooing anyone who is under the influence of alcohol or a controlled substance, and that rule applies regardless of age or consent. A parent can’t sign away that limit, and it applies to adult clients too.¹

Penalties if a Shop Skips the Rules

Violations of the tattoo statutes (Sections 324.520 through 324.526) are misdemeanors. The fines climb for repeat conduct:

First offense: a fine of up to $500.
Another offense within one year: a fine of at least $500 and up to $1,000.

These fall on the practitioner. Someone who lied about being a parent to get consent through faces the separate Class B misdemeanor charge described above.³

The bigger risk for a shop is licensing. The director of the Division of Professional Registration can suspend or revoke a practitioner’s license through administrative proceedings, so a violation that draws a modest fine can also end someone’s career.4 Civil liability sits alongside all of it: a client harmed by negligent work can sue for damages whether or not criminal charges are ever filed.

Piercings and Branding Follow the Same Rule

If the question is really about a piercing or a branding rather than a tattoo, the answer doesn’t change. Section 324.520 covers all three practices under the same age and consent framework: 18 to consent alone, under 18 only with written informed consent from a parent or legal guardian who is physically present at the shop.¹ Ear piercing for nonmedical purposes is the one carve-out from the piercing definition; every other perforation is treated like a tattoo for consent purposes.

1
Missouri Revisor of Statutes. Revised Statutes of Missouri 324.520 – Definitions, Tattooing, Branding, Body Piercing, Prohibited, When, Penalty
2
Justia Law. Missouri Code of State Regulations 20 CSR 2267-5.020
3
Missouri Revisor of Statutes. Revised Statutes of Missouri 324.520 – Definitions, Tattooing, Branding, Body Piercing, Prohibited, When, Penaltya>
4
Missouri Revisor of Statutes. Revised Statutes of Missouri 324.522 – License Required, Fee, Rules and Regulations