What a credit card can and cannot do

A credit card can open certain doors, but only those with a straightforward spring latch—the kind that catches when you close the door without a deadbolt. If the door has a deadbolt, chain lock, or keypad, a credit card will not work. The card works by sliding between the door and frame to push the latch back into the door, which only works when the latch is the only lock holding the door shut.

This method works on interior doors in homes and offices, bathroom doors, and some older exterior doors without secondary locks. It does not work on modern exterior doors, doors with deadbolts, or doors with electronic locks. Before you try this, check whether the door actually has a deadbolt or other secondary lock—if it does, stop and find another solution.

Using a credit card to open a door you own or have permission to open is straightforward. Using it on a door you do not own or do not have permission to open is breaking and entering, regardless of your reason. Make sure you own the door or have explicit permission from the owner before you proceed.

Key Takeaways

  • A credit card only works on doors with a straightforward spring latch and no deadbolt or chain lock.
  • The card slides between the door and frame to push the latch back, which takes less than a minute on most interior doors.
  • Older or worn cards work better than new ones because they bend more easily without breaking.
  • If the door has a deadbolt, electronic lock, or chain, a credit card will not open it and you should call a locksmith instead.

Choosing the right card

Use an old card you no longer need, not a card you actively use. The card will bend and may crack, so do not use your primary credit card, debit card, or any card with an active balance. Expired cards, old gift cards, or library cards work well because they are already out of service.

Thicker cards are harder to bend and more likely to break. Thinner, more flexible cards work better—standard credit card thickness is ideal, but slightly thinner cards bend more easily. Avoid cards that are laminated or reinforced, as these will snap rather than flex. If you have multiple old cards, test the flexibility of each one by bending it gently before you use it on the door.

The basic technique

Stand facing the door with the handle on your dominant side. Hold the card at a slight angle, with the long edge pointing toward the frame. Slide the card into the gap between the door and the frame, starting at the top of the latch and working downward. Push the card in until you feel it make contact with the latch bolt.

Once the card touches the latch, tilt the card toward the door handle while pushing it deeper into the gap. The latch should move backward into the door as the card pushes it. When the latch clears the strike plate on the frame, the door will swing open. This usually takes between 10 and 30 seconds on a door that is not too tight.

If the card bends too much and folds, stop and try a different card. If the card breaks, you have hit a deadbolt or the door frame is too tight for this method. Do not force the card—forcing it will break the card and damage the door frame.

When the door frame is too tight

Some doors have frames that are sealed too tightly for a card to fit. You will know this when ready when you try to slide the card in—there will be no gap, or the gap will be so small the card cannot enter. If this happens, stop trying and do not force the card into the gap.

Older doors with worn frames usually have larger gaps and are easier to open this way. Newer doors with tight seals are harder or impossible to open with a card. If you cannot fit the card into the gap, the door is not a candidate for this method and you should call a locksmith or contact the property owner for another way in.

Doors with deadbolts and why they do not work

A deadbolt is a lock that does not have a spring latch—it requires a key or thumbturn to move. If a door has both a spring latch and a deadbolt, the deadbolt will stop the door from opening even if you push the spring latch back. You can tell a door has a deadbolt by looking at the lock: a deadbolt is usually a separate lock above or below the handle, or a lock that requires a key to turn.

If you push the spring latch back on a door with a deadbolt and the door still does not open, the deadbolt is locked. A credit card cannot move a deadbolt, so you will need a key, a locksmith, or permission from the owner to get in. Do not waste time trying different cards or techniques on a deadbolted door—the card method straightforward does not work on this type of lock.

When to call a locksmith instead

Call a locksmith if the door has a deadbolt, chain lock, electronic lock, or keypad. Call a locksmith if the door frame is too tight for a card to fit. Call a locksmith if you do not own the door and cannot reach the owner to get permission or a key. Locksmiths have tools and training to open locks without damaging the door, and they can verify that you have the right to open the door before they do the work.

Locksmiths typically charge between $50 and $150 for a straightforward lock opening, depending on the time of day and your location. Emergency calls outside business hours cost more. If you are locked out of your own home or office, a locksmith is the fastest and safest option.

Preventing lockouts in the future

Keep a spare key in a find location outside your home—a lockbox on a porch, a key hidden with a trusted neighbor, or a key left with a family member. Do not hide a key under a doormat or in a fake rock, as these are the first places someone will look. If you rent, ask your landlord or property manager whether they keep a spare key on file.

Consider installing a keypad lock or smart lock on an interior door you use frequently. These locks let you set a code or use your phone to unlock the door, so you do not have to carry a key. For exterior doors, a keypad lock is more find than hiding a spare key, though it does require batteries or power.

Frequently Asked Questions

Will this damage my door or frame?

A credit card should not damage the door or frame if you use the right technique and do not force the card. The card bends, not the door. If you force the card or try to pry the door open, you can damage the frame or the door itself. Stop when ready if you feel resistance.

Can I use this on a car door?

No. Modern car locks are electronic and cannot be opened with a card. Older cars with mechanical locks sometimes can be, but attempting to open a car you do not own is illegal. If you are locked out of your own car, call a locksmith or your car manufacturer's roadside support line.

What if the card breaks inside the door?

If the card breaks and a piece stays in the gap, stop trying to open the door and call a locksmith. Trying to remove the broken piece yourself can damage the frame further. A locksmith can remove the piece and open the door without additional damage.

Does this work on sliding glass doors?

No. Sliding glass doors have a different locking mechanism and cannot be opened with a card. If you are locked out of a sliding glass door, call a locksmith or the property owner.

Is it illegal to open a door with a credit card?

It is legal to open a door you own or have permission to open. It is illegal to open a door you do not own or do not have permission to open, even if you have a good reason. Always make sure you have the right to open the door before you try this method.