Dinosaur Auction Tax Puzzle

A Montana rancher's $6-9m dinosaur sale could trigger Social Security tax penalties without counting against his earnings test.

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Oct 12, 2026

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Dinosaur Auction Tax Puzzle

A Montana rancher's $6-9m dinosaur sale could trigger Social Security tax penalties without counting against his earnings test.

In brief

A Montana rancher's $6-9m dinosaur sale could trigger Social Security tax penalties without counting against his earnings test. A 64-year-old Montana rancher may face Social Security tax penalties if his dinosaur fossil sale counts as income rather than capital gains. Originally reported by 24/7 Wall St..

Dinosaur Skeleton Up for Auction

teeth and skull of a mammoth, the fossil remains of a mammoth.

A nearly 20-foot predator nicknamed Jodi for the rancher who discovered it in Montana goes up for sale at Sotheby's New York on October 27 with an estimated price tag of $6 million to $9…

Retired Rancher Faces Tax Puzzle

A 64-year-old Montana landowner who started Social Security early and then finds a skeleton weathering out of a hillside his family has owned for decades suddenly faces a tax puzzle that could reshape his Social…

Social Security Earnings Test

Retirees who claim before full retirement age face an earnings test where Social Security withholds $1 for every $2 earned above $24,480 in 2026.

Capital Asset vs. Business Income

Capital Asset vs. Business Income

A sale of genuine personal property counts as capital gains, not business income, unless the seller runs a fossil business with regular sales.

Tax Implications for Fossil Sale

A single $24,000 Social Security check could become taxable if the fossil sale counts as income, triggering up to 85% of benefits being taxed.

How the Sale Affects Social Security

The IRS may classify the fossil as capital gains, but a single sale does not settle the classification and could still trigger tax penalties.

What Happens Next

The rancher must consult a tax professional to determine if the fossil sale counts as income or capital gains before the auction.

The bottom line

A 64-year-old Montana rancher may face Social Security tax penalties if his dinosaur fossil sale counts as income rather than capital gains.

Read the original on 24/7 Wall St.

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