Selling gold may seem like a private transaction. There's no app that publishes the transaction, nor a statement as visible as that of a stock. But if you're thinking about converting your gold bars or coins into cash, there's one thing you should be aware of: the Internal Revenue Service (IRS) can find out and collect taxes on that profit. In recent months, the price of gold has surpassed $5,000 per ounce. Many investors who bought when it was around $2,600 have seen their wealth grow rapidly. The temptation to sell and lock in profits is real. However, before doing so, it's important to understand two key things: how the IRS finds out about the sale and how much it could tax. How does the IRS know you sold gold? The IRS doesn't have a system that tracks every single bar that changes hands, but it does receive information through several indirect channels. First, there are the reporting rules for dealers. Certain precious metals transactions require dealers to file forms with the IRS detailing the transaction. This depends on the type of product and the quantity sold. If your transaction falls within those parameters, there is an official record. There are also reports for large cash payments. If you buy or sell gold with large amounts of cash, the dealer may be required to report the transaction to the Treasury Department. Although the primary intention is to prevent money laundering, this data can become part of the financial history that the IRS reviews if there are any concerns. Another clue is bank activity. Many sales are paid by wire transfer, check, or deposit. That money appears in your account. If the IRS detects discrepancies between your reported income and your deposits, they can start an investigation. The digital trail exists, even if the physical asset isn't on an online platform. And, of course, there's your own tax return. The most direct way the IRS knows you sold gold is because you reported it. The gains are taxable. If you don't declare them and the IRS later finds evidence of the sale, you could face back taxes, interest, and penalties.

How much tax do you pay when selling gold?

This is where many investors are surprised. Physical gold isn't treated the same as a traditional stock.

The first step is to calculate your gain. You take the selling price and subtract your cost basis. That cost basis includes what you originally paid plus commissions, dealer premiums, or shipping costs. If you sell for less than you paid, you could have a capital loss.

Then the length of time you held it matters. If you held it for a year or less, the gain is short-term. It's taxed as ordinary income, according to your personal tax rate.

If you held it for more than a year, it's a long-term gain. But here's the important difference: Physical gold, such as coins and bars, is considered "collectible" by the IRS. Long-term gains on collectibles can be taxed as much as 28%. That rate can be higher than what you would pay for selling a traditional stock or ETF. However, some gold-related investments are treated differently. Certain exchange-traded funds (ETFs) backed by physical gold may also be considered collectibles. Other ETFs and shares of mining companies are typically taxed under normal capital gains rules. That's why it's crucial to review the specific tax treatment before selling. Many states also tax capital gains as ordinary income. That can increase the overall impact depending on where you live. What to do before selling: If you're thinking about selling, keep all your documents: purchase invoices, receipts, bank statements, and the like. This information will help you correctly calculate your profit and justify the source of the money if you are ever asked.

Also think about the net sale price. Not just how much an ounce is worth today, but how much you will have left after taxes. Sometimes, waiting a few months to cross the one-year threshold can reduce your tax burden.

Gold can still be a useful tool as a hedge against inflation or volatility, but assuming its sale goes unnoticed can be costly. One thing is clear: Uncle Sam isn't going to miss the sale of precious metals like gold and silver, whether it's you or someone else. And it's better that the IRS finds out about any sale from you rather than someone else, as it can raise suspicion of fraud and trigger an audit. And nobody likes audits.