Error Coins Worth Money: What to Look For in Your Change

Every year, the U.S. Mint produces billions of coins — and sometimes, things go wrong. When they do, the resulting "error coins" can be worth far more than their face value. Some pocket change errors have sold for thousands, even hundreds of thousands of dollars. Here's how to spot them.

What Are Error Coins?

Error coins are coins that were produced with a mistake during the minting process. Unlike varieties (which are intentional design changes), errors are accidental. They occur when something goes wrong with the dies, planchets (coin blanks), or striking process. The U.S. Mint has strict quality control, so most errors are caught before coins leave the facility — but some slip through into circulation.

What makes error coins valuable is simple: they're rare and they're interesting. Collectors love the unusual, and an error coin is a tangible reminder that even the most precise manufacturing processes aren't perfect. The more dramatic and rare the error, the higher the value.

Doubled Die Errors

Doubled die errors are among the most famous and sought-after coin errors. They occur when a working die receives a second, slightly misaligned impression from the hub (the master die used to create working dies). The result is a coin with doubling visible on the lettering, date, or design elements.

The most famous doubled die in American numismatics is the 1955 Doubled Die Lincoln Cent. The obverse shows dramatic doubling on "LIBERTY," "IN GOD WE TRUST," and the date. Even in worn condition, these coins sell for $1,000 to $2,000. Uncirculated examples can fetch $20,000 or more.

Other valuable doubled dies include:

• 1969-S Doubled Die Lincoln Cent: $10,000 to $100,000+ depending on grade. One of the rarest doubled dies.
• 1972 Doubled Die Lincoln Cent: $200 to $1,000. More common but still collectible.
• 1995 Doubled Die Lincoln Cent: $20 to $100. The most affordable major doubled die — a great starter piece.
• 1917 Doubled Die Buffalo Nickel: $1,000 to $5,000 depending on condition.

How to spot them: Look at the lettering and date under magnification. True doubled dies show a distinct "shelf-like" doubling where the letters appear to have a raised second image slightly offset from the primary impression. This is different from machine doubling (also called "strike doubling"), which creates a flat, shelf-like effect and is worth very little.

Off-Center Strikes

An off-center strike occurs when the coin blank (planchet) isn't properly centered between the dies when struck. The result is a coin where part of the design is missing, with a blank crescent of metal visible on one side.

The value of off-center errors depends on two factors: how far off-center the strike is, and whether the date is still visible. A coin struck 5% off-center might only be worth a few dollars, but one struck 50% off-center with a full date visible can be worth $50 to $500 or more.

The sweet spot for collectors is roughly 40-60% off-center with a complete date. These are dramatic enough to be visually interesting but still identifiable. Coins struck more than 80% off-center start losing value because there's not enough design to identify the coin.

Wrong Planchet Errors

Sometimes a coin is struck on a planchet intended for a different denomination — or even a different country's coin. These "wrong planchet" or "wrong metal" errors are among the most dramatic and valuable errors you can find.

Famous examples include:

• 1943 Bronze Lincoln Cent: Struck on a leftover bronze planchet during the wartime steel penny year. Worth $100,000 to $1.7 million.
• 1944 Steel Lincoln Cent: The reverse situation — steel planchets from 1943 used in 1944. Worth $75,000 to $400,000.
• Quarter struck on a nickel planchet: $200 to $1,000 depending on the year and condition.
• Sacagawea dollar struck on a State Quarter planchet: These transitional errors can be worth $5,000 or more.

How to spot them: The coin will look wrong — different size, color, or weight than expected. A cent on a dime planchet will be silver-colored and smaller than normal. A quarter on a cent planchet will be copper-colored and smaller.

Die Crack and Die Break Errors

Coin dies are made of hardened steel, but they don't last forever. After striking thousands of coins, dies can develop cracks, chips, and breaks. When this happens, metal from the planchet fills the crack, creating raised lines or blobs on the finished coin.

Minor die cracks that create thin raised lines are common and worth only a small premium ($1 to $10). However, major die breaks — called "cuds" — can be quite valuable. A cud is a large, raised blob of metal that forms when a piece of the die breaks away completely, usually at the rim. Cuds on popular series like Lincoln cents, Washington quarters, and State quarters can sell for $50 to $500.

Clipped Planchet Errors

Coin blanks are punched from strips of metal, much like cookies from dough. If the strip isn't fed through the blanking press correctly, the punch can overlap with a previously punched hole, creating a blank with a curved bite taken out of it. When this blank is struck into a coin, you get a "clipped planchet" error.

Clipped planchets are relatively common as errors go, but they're still collectible. A small clip (less than 10% of the coin missing) might add $5 to $20 to a coin's value. A dramatic clip (25% or more missing) can be worth $50 to $200. Multiple clips on the same coin are rarer and more valuable.

Broadstrike Errors

A broadstrike occurs when a coin is struck without the collar die in place. The collar is the ring that normally contains the planchet during striking, giving coins their uniform diameter and creating the reeded edge on quarters and dimes. Without the collar, the planchet spreads outward, creating a coin that's wider and thinner than normal with no edge detail.

Broadstrike errors are moderately valuable, typically selling for $10 to $100 for modern coins. They're more interesting when the coin is noticeably wider than normal, which makes the error visually obvious.

Transitional Errors

When the Mint changes a coin's composition or design, errors can occur during the transition period. The most famous transitional errors include the 1943 bronze cents and 1944 steel cents mentioned earlier, but there are modern examples too.

In 1982, the Mint changed the composition of Lincoln cents from 95% copper to copper-plated zinc. During the transition, both types were produced, leading to subtle varieties. The 1982-D Small Date Copper cent is a transitional rarity worth $10,000 or more because few were struck in the old copper composition with the small-date variety.

Another collectible transitional error involves the Sacagawea dollar and State Quarter. In 2000, "mule" coins were discovered with a Sacagawea dollar obverse and a State Quarter reverse (or vice versa), struck on the wrong planchet. These extraordinary errors have sold for over $100,000.

How to Check Your Change for Error Coins

You don't need expensive equipment to start looking for error coins. Here's a practical approach:

• Get a magnifying loupe: A 10x jeweler's loupe costs $10 to $20 and is essential for examining coins closely.
• Check the date and lettering: Look for any signs of doubling, especially on the date and "LIBERTY."
• Examine the edges: Look for clips, broadstrikes, or missing edge details.
• Check the color and size: Does anything look off compared to a normal coin of the same denomination?
• Weigh suspicious coins: A digital scale accurate to 0.1 grams can detect wrong-planchet errors. A modern copper cent should weigh 2.5g; an older copper cent weighs 3.1g.
• Look at both sides: Some errors are only visible on one side of the coin.

Common Mistakes When Identifying Errors

Not everything unusual on a coin is a valuable error. Here are common things that look like errors but aren't:

• Post-mint damage (PMD): Scratches, dents, and other damage that occurred after the coin left the Mint. The most common mistake new collectors make is confusing PMD with mint errors.
• Machine doubling: A flat, shelf-like distortion caused by die bounce during striking. Unlike true doubled dies, machine doubling is extremely common and adds no premium.
• Die deterioration: Worn dies can produce mushy-looking designs that might appear doubled but are just worn. These are not valuable errors.
• Copper plating bubbles: Modern zinc cents sometimes develop blisters or bubbles in the copper plating. While unusual-looking, these are considered minor defects and are worth very little.

Where to Sell Error Coins

If you find a genuine error coin, here are your options for selling:

• Online auction sites: eBay has a large market for error coins. Research comparable sold listings to price your coin.
• Coin dealers: Local and online coin dealers buy error coins. Get multiple offers to ensure a fair price.
• Coin shows: Meet dealers and collectors in person. Great for getting expert opinions and competitive offers.
• Specialty error coin dealers: Some dealers specialize exclusively in error coins and may pay premium prices for rare examples.

For valuable errors (worth $100+), consider getting the coin professionally graded by PCGS or NGC first. A third-party grade authenticates the error and significantly increases the coin's marketability and value.