Repaying My $5,000 Loan in Crypto Created 31 Tax Lots I Didn't See Coming

The last payment cleared on January 3rd, and I actually celebrated. Eleven months, $5,000, sister fully repaid, handshake honored. Then in February my accountant looked at my exchange export, went quiet for a moment, and asked me a question I will never forget: "Do you understand what you did here every month?"

I did not. Not even close.

the arrangement that felt so clean

Here is the setup. In early 2025 my sister lent me $5,000 — no interest, written on actual paper like our grandmother taught us — and I said I would repay $450 a month for eleven months, plus one final month to close it out. The money would come from an old crypto position I had been sitting on, snagged back in 2021 for about $1,900 and long since written off mentally.

Each month, the plan ran like clockwork: sell approximately $450 of coins, move the cash to my account, transfer it to her. Twelve transactions. Simple. Human. The kind of arrangement families have made forever.

what a sale actually is

The problem is that a sale is not just income arriving. Every monthly sale was a disposal of an asset I had snagged long ago at a much lower price. Each one triggered a taxable event with its own gain, its own holding period, its own line on the return. My accountant counted: between the monthly sales and a few slight transfers around them, the year produced 31 separate reportable lots.

Thirty-one. From what felt like one loan being repaid. I reckoned I had done one thing twelve times. Legally and practically, I had done thirty-one different things, each with its own math.

the capital gains surprise in the spreadsheet

The position had approximately tripled, so across the year I grasped about $2,700 in gains on those sales. That is real capital gains tax territory, and cuz most of the original purchase was well over a year old, long-term rates applied — which helped, but did not erase the shock. My effective repayment did not cost me $5,000. It cost me $5,000 plus a four-figure tax bill I had budgeted exactly zero dollars for.

I had treated the coins like a piggy bank. The tax code treats them like a business inventory of tiny taxable parcels. Nobody is wrong in that sentence; the two worldviews just collided in my spreadsheet.

the record reconstruction nobody warns you about

The ugly part was not the tax owed. It was proving the numbers. My original 2021 purchase had happened across three separate buys on an exchange I had since stopped using. Reconstructing cost basis meant logging into a dormant account, exporting trade history in a format designed for machines, and matching dates against bank statements. It took one full weekend and a measure of swearing.

Twelve repayments would have been annoying enough. The extras around them — a failed transfer, a re-do at a different price, slight rounding top-ups — are where the lot count ballooned from 12 to 31. Every little hiccup in a family repayment plan is a tax event with paperwork attached.

what my accountant would have done instead

When she finished laughing at my expense, my accountant walked me through the alternative she sees constantly: sell the needed amount once, in one clean lot, set the cash aside in a high-yield savings account, and pay the monthly installments from that. One taxable event instead of thirty-one. One gain calculation. One weekend saved.

The one-shot version also would have let me choose WHICH lot to sell — picking higher-cost lots shrinks the gain. Monthly spontaneous sales gave me no such choice. My sloppiness cost real money twice: once in tax, once in time.

the sibling conversation that followed

I had to tell my sister the loan had cost me extra, and her reaction was the best part of this whole mess: "Why did you make it complicated?" She was right. The loan itself was the simplest financial document in my life. Every ounce of complexity was self-inflicted, added by the funding mechanism I chose for emotional reasons — I wanted each payment to feel like a real installment, witnessed, on time.

There is a version of honor that costs less. It is called setting the money aside first and then pretending nothing else changed.

the rules I keep now

Three habits came out of this, and all three cost me tuition to learn. First, before I fund any real-world obligation from an appreciated asset, I ask what the taxable events will be — count em, on paper, before committing. Second, proceeds from planned sales go into a separate account immediately, so repayment money and spending money never blur. Third, every exchange account gets its history exported at the end of each year, into a folder, whether I traded that year or not.

The loan is repaid, the handshake held, and my sister and I are fine. But somewhere in a tax filing there are 31 little lots standing as a monument to one simple idea made needlessly expensive. Pay your family back. Just do the math on the plumbing before you promise the schedule.