Here's the answer up front: VUAG and VUSA are the same fund. Same S&P 500, same 500 companies, same 0.07% annual fee, run by the same people at Vanguard. The only difference is what happens to the dividends. VUSA pays them into your account as cash, usually every quarter. VUAG keeps them and reinvests them for you automatically.
So if you're investing in an ISA or a SIPP and you don't need the income, buy VUAG and get on with your life.
That's it. That's the whole answer.
If a question takes someone 1,500 words to answer, they're usually selling something. This one takes two sentences.
What's actually different between VUAG and VUSA?
One thing, and one thing only:
VUSA | VUAG | |
|---|---|---|
What it holds | The S&P 500 | The S&P 500 |
Annual fee | 0.07% | 0.07% |
Dividends | Paid to you as cash, quarterly | Reinvested automatically |
Launched | 2012 | 2019 |
Everything else you'll read about them — fund size, launch date, share price — makes no difference to what you end up with. The share prices look different because VUAG has been quietly folding the dividends back in since 2019, so its price has grown faster. Your return is identical either way, provided VUSA's dividends get reinvested rather than sitting in cash.
And that's the catch with VUSA: someone has to do the reinvesting. Either you do it yourself every quarter, or you set up your platform to do it, sometimes for a small dealing fee. Miss a few quarters and the cash just sits there earning nothing — doing nothing is harder than it sounds, and unreinvested dividends are one of the quiet ways people leak return without noticing.
VUAG removes the job entirely. Nothing to remember, nothing to click, no cash drag.
So when would anyone buy VUSA?
Two honest cases.
First, if you actually want the income — you're drawing on your investments and would rather the dividends landed as spendable cash than grew the pot. That's a real preference, mostly for people in retirement.
Second, if you're investing outside an ISA or SIPP, in a general investment account. Here VUSA is simpler at tax time, for an unintuitive reason: with VUAG you still owe tax on the dividends even though you never see them. HMRC taxes the reinvested income anyway, and working out the numbers from Vanguard's reports is genuinely tedious. With VUSA the dividends arrive visibly, and the paperwork matches what happened.
Inside an ISA or SIPP none of this applies — no tax on dividends either way — which is why the answer there is simply VUAG.
Which one do I own?
VUAG. It's the default investment in my own portfolio — the foundation everything else is built on. There are marginally cheaper S&P 500 trackers around, but at this level the differences between the good ones are about £40 a year on every £100,000 — and that is not a reason to keep shopping. Pick one, buy it, get on with your life.
The decision that actually matters is not VUAG versus VUSA. It's whether your money is in the market at all, and whether the S&P 500 is the right foundation for it — which for most people, most of the time, it is.
Ten minutes on this question is sensible. Ten weeks on it is a way of avoiding the £10,000 decision by perfecting the £40 one.
This is what I write about every week — managing your own money in plain English, without paying someone 1–2% a year to do it worse. The letter is free.
I am not a financial adviser. Nothing here is personal financial advice. This is my own experience and opinion, shared for information and education. Investing involves risk and you can lose money. Please do your own research before acting.