For These Collectors, It’s Still All About the Cash

Even as the world increasingly moves toward digitised commerce, where transactions are conducted with the tap of a credit card and billions of dollars are moved electronically between banks, there is one group of people for whom hard cash is still king: collectors.

As an alternative asset class, collectible banknotes offer significant potential value to investors, and the market for these paper artefacts is thriving. Aris Maragoudakis , director of world currency auctions at Stack’s Bowers Galleries in Costa Mesa, Calif., estimates the hobby sees annual trade of well over $500 million globally.

In fiscal year 2016, the World Paper Money department at Stack’s recorded about $4 million in sales. By fiscal year 2024, this figure had risen to $14.5 million. The company reported an 18% increase in sales for world paper money (which doesn’t include U.S. paper-money numbers) in fiscal year 2023, followed by 25% growth in fiscal year 2024.

Elsewhere, the Noonans Mayfair London realised £5 million, or about $6.5 million, in world banknote sales in 2023, up from £2.5 million the previous year, a representative said.

The rise of digital technology has helped broaden the base of collectors. Online auctions, forums and databases have made it easier for collectors to connect, trade and research. Greater access to information about collectible money, as well as to collectible banknotes themselves, have transformed the hobby from a game of chance to a strategic pursuit where enthusiasts can actively search for and acquire valuable pieces.

“The advent of social media such as Instagram and WhatsApp have brought in a spate of new collectors, especially youngsters,” says Rezwan Razack , a specialist in vintage banknotes and chairman of the Indian chapter of the International Bank Notes Society, or IBNS.

While social media has made more people aware of older paper currencies and their histories, the declining use of physical banknotes has made them even more alluring and fascinating to collectors.

Where is the value?

Banknotes routinely become obsolete due to political shifts, security upgrades, monetary policies and technological advancements. The question is: Which ones are worthy possessions?

A plethora of factors underpin the desirability of collectible paper money. The major ones are:

• Condition: The condition of a piece can have a significant impact on its value. “There are bills that sell for $1,000 with a fold or two, but finding one free of any folds, stains, or tears could be worth several times that,” says Maragoudakis.

The condition of a bill is evaluated based on a 30-point scale ranging from poor to uncirculated crisp. Within each condition, a bill is given a number grade; a higher number—on a scale typically from 1 to 70—means the banknote is in better shape.

For example, a 10,000-yuan note issued in 1951 by the People’s Bank of China, graded Very Fine 20, sold for $150,000 at a Stack’s Bowers auction. Three years later at another Stack’s Bowers auction, a similar note in better condition, graded Almost Uncirculated 50, fetched $358,500.

• Serial number : Banknotes with striking serial numbers are often worth more to collectors than those without. On eBay, a rare polymer £20 bill with the serial number AA44 444444 received 16 bids and sold for more than £317.

A set of four exceptionally rare Chinese 1953 10 yuan notes from the People’s Bank of China recently sold for $432,000 because in addition to their quality, they were consecutive in serial number.

• Scarcity : The appeal and worth of banknotes, as with other collectibles, are often tied to their rarity.

For instance, high-value banknotes were often printed in limited quantities due to their significant purchasing power, says Hakim Hamdani , director at large and a collector at the Netherlands branch of the IBNS. When these high-denomination notes are discontinued, many people cash them in rather than keeping them as collectibles.

Take the 1921 10,000-shilling note from British East Africa (now Kenya and Tanzania), of which few were printed and issued. At that time, it was equivalent to about $2,000, a substantial sum in 1920s colonial Africa. When they were demonetised, most were redeemed, making the few remaining in private hands highly desirable.

Dennis Hengeveld , president of World Banknote Auctions in Sacramento, Calif., says that depending on the condition, some of these notes have fetched between $35,000 and just over $100,000 at auctions.

A rare $500 Canadian bill from 1911 brought C$528,750 (about $386,400) at a recent auction, the largest sum ever paid for a Canadian banknote. The specimen features the image of Queen Mary and is one of only four of the bills known to exist.

• Error notes : Governments often withdraw banknotes from circulation to deter counterfeiting, but also due to printing anomalies such as incorrect signatures, numerical discrepancies, misprints and typographical errors. Such deviations can elevate their value among enthusiasts.

In the U.S., double denominations—such as a front displaying a $10 bill and the reverse displaying a $20 bill—are the most prized error notes. The value of some of these pieces could top $85,000, according to Heritage Auctions.

How can I get started?

Despite the potential for a lucrative return, experts say the primary motivation for building a collection should be enjoyment and an appreciation of the history that banknotes provide. It would be best to build a collection with the idea of having fun, says Hengeveld of World Banknote Auctions, which was recently acquired by Stack’s Bowers.

Of course, it’s essential to do your due diligence to avoid fraud. Always buy notes from established dealers and confirm their authenticity with reputable grading services. Independent grading companies such as Paper Money Guaranty and Professional Coin Grading Service provide authentication and grading to ensure notes are genuine and their condition accurately assessed.

Auction houses and local dealers offer currency notes in different price ranges. Online retailers (eBay, Amazon.com, Collectibles & Currency), dealers and galleries (Certified Coin Exchange, George H. LaBarre), and numismatic shows (the MIF Paper Money Fair and World’s Fair of Money) are other useful sources.

As well, there is no shortage of stories where people discovered highly valuable collectible banknotes in attics, books, dressers and photo frames of deceased family members. In Ontario, a rare Canadian $500 bill from 1911 was discovered among the personal belongings of a deceased individual. The nearly discarded banknote, one of only three in existence, brought $322,000 at auction.

Those looking to dip their toes into collectible money may find valuable insights in trade magazines including Bank Note Reporter and the Greensheet, or books such as the U.S. Error Note Encyclopedia and Standard Guide to Small-Size U.S. Paper Money.

Additionally, Paper Money Guaranty, the Smithsonian Learning Lab and other websites can offer a wealth of information on various aspects of grading, collecting and how to properly care for banknotes.

Happy is the family whose members—parents, grandparents and grown children—trust each other enough to cooperate on shared goals, especially financial ones. When that is truly the case, Uncle Sam’s tax rules can help as well.

This matters especially now that mortgage rates are above 7%, and many families are looking for ways to help younger members. If the elders have resources and are confident younger ones can cooperate, a family loan could make homeownership possible while providing the elders with a useful income stream.

Other strategies can actually lower taxes, such as when funding 529 plans or Roth IRAs, or when someone inherits a traditional IRA with required withdrawals larger than they will need.

Here are three strategies useful for functional families.

Intrafamily loans

It is perfectly legal for families to lend money to a relative for a down payment or even a private mortgage.

But it is important not to cut corners, says Ryan McKeown, a CPA with Modern Wealth Enhancement in Minnesota. If the loan is for a down payment, be honest with the mortgage provider and have a formal agreement. The lender owes tax on the interest payments received.

If the loan is for a private mortgage, both sides should have legal representation with a formal written agreement, including payment terms. The lender owes tax on the interest, and the borrower often can deduct it if he or she itemizes.

To avoid IRS trouble, the interest rate shouldn’t be lower than the agency’s Applicable Federal Rate at the time of the loan. Currently that is about 5% for loans longer than nine years; about 4.5% for loans three to nine years; and about 4% for loans three years or less. Currently, traditional mortgage rates are generally above 7%.

In addition, the lender could use the $19,000 annual gift-tax exemption (described below) to forgive some or all of the interest or principal annually. If both lenders and borrowers are married, that is up to $76,000 a year. There is no tax for the borrower on such forgiveness, because it is from a gift.

If you’re going this route, McKeown advises against having a fixed plan to forgive the debt. Instead, do it in one-off letters specifying the amount—and keep careful records. Otherwise the IRS might try to treat the loan as a taxable gift.

Asset gifts

Powerful tax-saving moves for families often use gift-tax provisions. Under current law, anyone can give anyone else up to $19,000 of assets annually, free of gift tax. That means a married couple with three grandchildren could give them a total of $114,000 in 2026.

The gifts can be cash or other assets, like stock. For noncash gifts, the cost basis—which is the starting point for measuring taxable gain after a sale—“carries over” to the recipient. So if someone buys $1,000 of stock and gives it away when it is worth $5,000, the recipient’s cost basis is $1,000. If the recipient later sells the shares for $8,000, the taxable gain is $7,000.

Here’s an example showing how gifts could save a family taxes. Grandma is a widow of modest means, while her child and spouse have prospered. The couple has two children, and they want to contribute $5,000 to a 529 college-savings plan for each—but they need to sell stock to do it. Their tax rate on the sale would be 18.8%, and they would need to sell about $11,000 of stock.

However, Grandma’s federal tax rate on the stock sale is 0%. If the couple gives $10,000 of shares to Grandma, she could sell them, pay no tax, and fund the grandchildren’s 529 plans. This saves about $1,000 of tax.

These moves are legal, and they could be used in other ways, such as to help a young person fund a Roth IRA.

But trust among family members is essential: Under the law, givers can’t put conditions on a gift. Grandma could use her stock proceeds to take a cruise, but she makes 529 contributions instead.

Mark Sellner, a retired tax attorney and CPA living in Sarasota, Fla., uses this strategy. His children sell stock he gives them and fund 529 plans for his grandchildren.

The family’s tax savings aren’t huge, but he likes other benefits. The sales by his children don’t boost his adjusted gross income, which in turn could raise his Medicare Irmaa premiums or his 3.8% surtax on net investment income.

Sellner doesn’t worry about his children using the funds for another purpose.

“There can’t be any strings attached to gifts. Of course, it is up to us to decide whether to make them in the future,” he says.

Two caveats: The “kiddie tax” applies to most children under age 24, and it is levied at the parents’ rate on investment income above $2,700 in 2026. Consider this before making gifts to a young person.

Investors who give away stock also forgo the step-up, an important provision that exempts assets held at death from capital-gains tax.

Sellner knows he’s losing a step-up, but says, “The children could use a little more now. Why should they wait 20 years to get it?”

Disclaimers

A disclaimer is a highly useful strategy in which one heir renounces an inheritance in favor of another heir. Assuming family members cooperate, this can save taxes.

Here’s one example. Dad died and had a large traditional IRA that he left to Mom. She has enough assets and income to cover her expenses, and she lives in a state with a stiff estate tax. The inherited IRA would put her estate over the threshold.

Also surviving are three young-adult children. If Mom disclaims all or part of Dad’s IRA within nine months of his death, that amount could go directly to the children. They will have 10 years to empty the account, and the family as a whole will likely save estate and income taxes.

Disclaimers have many key details, especially regarding beneficiary documents. Although heirs have great freedom in choosing what assets to disclaim, the rules about who gets disclaimed property are rigid. It is best if the original owner names tiers of heirs so that if one disclaims, the next recipient is clear.