Can You Smile in a UK Passport Photo? HMPO Expression Rules Explained

HMPO's Official Expression Rule

HMPO requires a neutral facial expression with your mouth closed. Specifically:

• Neutral expression — no smile, no frown, no raised eyebrows
• Mouth closed — lips relaxed and together, teeth not visible
• Eyes open and looking directly at the camera
• Face relaxed and natural — not tense or exaggerated

This rule applies to all adults without exception. Very young children (under 3–4 years) may be given slight flexibility, but the priority is still showing their full face clearly.

Why Does HMPO Reject Smiling?

Smiling distorts your facial features in ways that prevent accurate facial recognition at border control. HMPO's automated biometric system matches your face in real-time at airports and borders — and it is trained on neutral expressions.

When you smile, your cheeks rise and change facial proportions, your eyes narrow and shift position, and the overall geometry of your face changes significantly. These changes can prevent the system from matching you to your passport, causing delays at border control.

This is not an arbitrary rule — it is a security requirement for reliable biometric verification.

What 'Neutral Expression' Actually Means

A neutral expression is simply your natural, relaxed resting face — not a forced look or an unpleasant one. To achieve it:

1. Relax your facial muscles completely 2. Close your mouth gently — not pressed tight, just naturally together 3. Keep your eyes fully open and looking directly at the camera 4. Think of your face when you are focused on reading — calm and natural 5. Take multiple photos and choose the most neutral one

A naturally serious or 'resting' face is completely acceptable. The requirement is neutral and relaxed, not happy or pleasant.

Common Expression Mistakes That Cause Rejection

Smiling — Even a slight or 'resting smile' will be flagged. If you naturally have an upward-curving mouth, consciously relax it.

Mouth open — Teeth must not be visible. This often happens when people concentrate on staying still.

Raised eyebrows — Frequently happens unconsciously when looking at a camera. This creates unnatural facial geometry.

Squinting — Caused by bright lighting or bright flash. Ensure lighting is even and not directed into your eyes.

Closed or half-closed eyes — About 10–15% of photos are rejected for eye-related issues. Eyes must be wide open and looking directly at the camera.

Can a Natural Smile Ever Be Accepted?

No. Unlike some countries — the USA, for example, allows a natural smile — the UK does not permit any smile at all. HMPO's guidance is unambiguous: the expression must be completely neutral.

Even a small, subtle smile will be flagged as non-compliant by HMPO's automated checks. There are no exceptions for adults, regardless of how natural or slight the smile is.

Children and the No-Smile Rule

Children must also have a neutral expression in UK passport photos. However, very young children (under 3–4 years) may be given slight flexibility because maintaining a neutral face is difficult at that age.

For infants under 1 year, eyes may be closed. For children under 6, they do not need to look directly at the camera. For all children, the priority is showing the full face clearly against a plain background.

For guidance on photographing babies and young children, see our UK baby passport photo guide.