Of all fancy serial number patterns, the solid serial number is the holy grail. Every single digit is identical — a sight so striking it stops people in their tracks.

The nine possible solids: 11111111, 22222222, 33333333, 44444444, 55555555, 66666666, 77777777, 88888888, and 99999999. That is nine notes out of roughly 100 million possible serials per denomination.

Why Are Solid Notes So Valuable?

Three factors drive solid note value: extreme rarity, instant visual impact, and international collector demand. The number 8 is considered auspicious in Chinese culture, making 88888888 notes sought after by collectors globally — cross-market demand that regularly pushes prices above any other solid serial.

Solid Serial Number Values

Serial$1 Bill$100 BillNotes
11111111$500-$1,200$2,000-$5,000Strong demand
77777777$500-$1,200$2,000-$5,000Lucky number, strong demand
88888888$800-$2,500$3,000-$10,000+Highest demand globally
99999999$500-$1,200$2,000-$5,000Strong demand
All others$350-$900$1,400-$4,000Good demand

Condition Matters Enormously

An uncirculated solid note can sell for 3 to 5 times a worn circulated example of the same serial. If you find one, handle it by the edges only and sleeve it immediately. For notes worth over $500, PMG grading is almost always worth the cost.

Check your serial number instantly — our free tool detects solids and eight other patterns simultaneously.

Solid SerialFancy SerialHoly GrailRare Banknotes

Frequently Asked Questions

What is a solid serial number?
A solid serial number has every digit identical — for example 11111111, 55555555, or 88888888 on a US dollar bill.
How much is a solid serial number worth?
A solid $1 bill typically fetches $500 to $2,000. A solid $100 note has sold for over $10,000 in exceptional condition.
How rare is a solid serial number?
There are only 9 possible solid serials per denomination. The odds of receiving one in circulation are roughly 1 in 11 million.
Which solid number is most valuable?
88888888 is generally the most valuable due to the significance of 8 in Chinese culture, creating strong international collector demand.