Calculator
FIFO versus average cost
Enter two buy lots, oldest first, and a partial sale. The tool closes the oldest shares first, then shows the gain you would get from a single blended price. The difference is why a broker’s average and a FIFO ledger disagree.
What is being compared
FIFO asks which shares you sold. Average cost asks what the remaining pile cost in total and spreads that across every share. On a partial sale those are different gains. Neither figure files your tax. They explain a personal book.
The default shape of the example in the FIFO guide is 100 shares at 200, then 100 at 170, selling 50 at 225. Oldest-lot cost is 200, so the FIFO gain is driven by 225 minus 200. The blended price is lower, so the average-cost gain is larger. Type those numbers if you want to see it move.
Common questions
Which method does NCCPL use?
Do not take a calculator’s method as the filing method. Ask the official material and your adviser. This page only shows that the two personal methods diverge.
Can I enter more than two lots?
This public form takes two. The app’s ledger handles a longer stack, including transfers and same-day buys.
What if I sell more than I bought?
The tool stops. It will not invent a cost for shares that were not in the lots.