How to do a year-end portfolio review

Here is a question to ask yourself before the year quietly closes the door behind it. Do you actually know how you did this year? Not the gut feeling, not the one trade you keep retelling at dinner, but the real number, totalled across every account you hold. Most people genuinely have no idea. They have a vibe, a vague sense of green or red, and a New Year’s resolution to “be more disciplined” that evaporates by the second week of January. So let me sell you on the grown-up alternative: a proper year-end portfolio review, done once, on purpose, while the year is still fresh enough to learn from.

This is the big annual sit-down. Your quarterly review is a tune-up; the year-end is the full audit. You reconcile the whole book, total twelve months of realised P&L, read a year of your own behaviour back to yourself, put every thesis on trial, and close out the tax year before the calendar forces your hand. It is the one review where you get to see the whole arc rather than a slice of it.

Why a year-end portfolio review beats a New Year’s resolution

A resolution is a wish you make about a future version of yourself you have not met yet. An annual portfolio review is evidence about the actual you, the one who placed real trades with real money this year. One of those changes behaviour. The other one sells gym memberships.

Doing it at year-end is what finally gives you a complete unit of time to judge. A quarter can be noise. But a full year of earnings and dividends and drawdowns and your own reactions to all of it is a proper sample. It is long enough to show your patterns, and you still remember why you did things. Do it now, in writing, and next January your “resolution” stops being a vague vow to do better. It turns into a specific list of things you already proved you get wrong.

Reconcile the whole book first

Start where you always start. Nothing you conclude this year means anything if the ledger underneath it is wrong. The realised P&L, the win rate, the drift, every number in this review just inherits the trustworthiness of the book it sits on.

So go account by account and tie each one out against its real year-end statement: share counts, cash balances, tax lots. Because you typed every transaction into Strata yourself, your holdings are derived by replaying that ledger, so a discrepancy is a genuine signal and not some scramble a credential robot made while you slept. Find a mistake from back in March? Void the bad entry and re-enter it so the audit trail keeps the history honest. It is the same reason accountants do not use erasers. Once the whole book ties out, you can read your true net worth across every brokerage, pension, and wallet as one consolidated number you can actually stand behind, which is the only foundation worth building the rest of the review on.

Total the year’s realised P&L, honestly

Now for the number almost nobody computes properly: what did you really make or lose this year. Not unrealised paper swings on things you still hold, but realised P&L, the profit and loss locked in on everything you actually sold across the whole book.

Because your sells are logged against FIFO tax lots, Strata derives the realised figure for the year, lot by lot, instead of leaving you to reconstruct it from a shoebox of contract notes in April. Read it as one total, then look at where it came from. Did the gains lean on one lucky position, or did the process do the work across many? A green year built on a single moonshot will not repeat. A green year built on a method might. This is also the figure your tax housekeeping hangs off later, so getting it right here pays twice.

Put the journal and the theses on trial

Your journal is the only honest record of how you behaved this year, as opposed to the flattering highlight reel your memory has been quietly editing. We are all geniuses in retrospect. The year-end review is where you read the receipts.

Look at your win rate and expectancy over the full year, not a quarter. Expectancy is the one that tells you whether your process actually makes money rather than whether you got lucky. Compare plan against actual across the year: where did you drift from the entry, stop, target, or size you wrote down when you were calm, and did wandering off help or hurt? Then read the emotion scorecard over twelve months, because a single panicked sell is an anecdote but the same mistake twelve times is a leak you can plug. That whole arc, reasoning written down then confronted with results, is the discipline loop closing over a full year instead of a few weeks.

Then walk every thesis you held this year and ask the blunt question: did the reasoning hold, or did it break? A thesis is a living document, the drivers, assumptions, sizing, and invalidation rules you set down at the start. Over a year some of those invalidation signals will have breached and flipped a thesis to AT-RISK, and the review is where you stop letting them glow red in the corner and decide what they mean. Conviction that survived a real year of news has earned something. A thesis that quietly broke months ago and that you are still holding out of habit and hope is exactly the position selling once the reason is gone was invented for. Mark each one: held, evolved, or broken.

Allocation drift and tax housekeeping

Step back from the individual names and look at the shape of the whole thing after a year of it moving on its own. Compare your allocation to your targets by asset class, sector, and position size, and measure the drift. A winner that ran all year is also a concentration you never consciously chose, and a year is plenty of time for a deliberate portfolio to quietly turn into an accidental one.

Then do the housekeeping the calendar actually forces, because the tax year does not care about your vibes. Read the dividends you received this year against what you projected, and look at the calendar ahead. Check your tax lots before you act on any of the drift you just found: which holdings are long-term, which sells would realise gains you would rather not book in this tax year, which sit in which wrapper. This is general education and not tax advice, but the principle is simple. A rebalance decided on price alone, in the last weeks of a tax year, can hand more to the revenue than the drift was ever costing you. The whole point of doing this at year-end is that the deadline is real, so make the move on purpose rather than in a panic on the final day.

Set intentions for next year, then mostly do nothing

By now the book ties out, the year is totalled, your behaviour is on the table and every thesis has had its day in court. So write down what you will do. Once, on purpose. Trim, add, exit, or leave it alone, with the reasoning attached so next year’s review can grade today’s calls. And here is the punchline the resolution industry will never sell you. After a full and honest annual review, “nothing dramatic” is usually the right verdict. When the book reconciles and the realised P&L came from a method and the surviving theses earned their place and the drift is tolerable, you should end on a short list of small moves and a long exhale.

The intentions worth setting are not heroic. They are specific, drawn straight from the leaks you just found in your own journal. The FOMO entries. The targets you never honoured. The broken thesis you held three months too long. Fold those into how you run next year, day to day, the way a calm morning routine keeps a book honest between the big reviews. Nobody compounds for decades on the strength of a bold January resolution. The people who manage it are the ones boring enough to sit down every December, read the truth, and adjust by a few degrees. So be that person. You can build your portfolio ready for the next twelve months to actually mean something.