Introduction
If you want to grow your money without spending hours picking individual stocks, investing in the best S&P 500 ETFs is one of the smartest moves you can make. These funds give you instant ownership of 500 of the largest U.S. companies in a single trade. Think Apple, Microsoft, Amazon, and hundreds more.
But here is the part most investors miss. Not all S&P 500 ETFs are equal. They track the same index, but their fees, structures, and tax efficiency differ in ways that quietly eat into your returns over time. The wrong choice can cost you thousands of dollars over a 20 or 30-year holding period.
In this article, you will learn exactly what S&P 500 ETFs are, how the top funds compare, which one has the lowest expense ratio, and how to pick the right one for your situation. No jargon, no fluff. Just clear answers.
What Is an S&P 500 ETF?
An S&P 500 ETF is an exchange-traded fund that tracks the S&P 500 index. The S&P 500 is a market-capitalization-weighted index of 500 of the largest publicly traded U.S. companies across every major sector. It is the most widely used benchmark for U.S. large-cap equity performance.
When you buy a single share of an S&P 500 ETF, you get proportional exposure to all 500 companies in that index. The fund does the heavy lifting. You do not need to pick stocks.
ETFs trade on stock exchanges throughout the day, just like shares of a company. Their prices update in real time. This makes them more flexible than traditional mutual funds, which only price once a day at market close.
Why the Best S&P 500 ETFs Matter More Than You Think
The S&P 500 has historically delivered an average annual return of around 10% before inflation over the long term. A low-cost ETF that tracks this index lets you capture nearly all of those gains. A high-cost one quietly drains a portion of them.
Consider this. If you invest $100,000 and hold it for 30 years at an average 10% annual return, a 0.03% expense ratio costs you around $900 total in fees. A 0.09% expense ratio costs you nearly $2,700. That difference grows even larger at higher investment amounts.
Small fees compound into big differences. That is why choosing the right S&P 500 ETF matters.
Top 5 Best S&P 500 ETFs in 2026 Compared
Here is a side-by-side look at the five most popular options. All figures are sourced from fund providers, ETF.com, and NerdWallet as of August 2026.
| ETF | Ticker | Expense Ratio | AUM | Fund Type | Best For |
|---|---|---|---|---|---|
| Vanguard S&P 500 ETF | VOO | 0.03% | Over $1.5 trillion | Open-end ETF | Long-term investors |
| iShares Core S&P 500 ETF | IVV | 0.03% | Over $686 billion | Open-end ETF | Long-term investors |
| SPDR S&P 500 ETF Trust | SPY | 0.0945% | Over $600 billion | Unit Investment Trust | Traders and options users |
| SPDR Portfolio S&P 500 ETF | SPLG | 0.02% | Around $95 billion | Open-end ETF | Cost-conscious beginners |
| Invesco S&P 500 Equal Weight ETF | RSP | 0.20% | Around $95 billion | Open-end ETF | Diversification seekers |
VOO vs IVV vs SPY: The Big Three Explained
These three funds are the most compared S&P 500 ETFs on the market. Here is what actually separates them.
VOO: Vanguard S&P 500 ETF
VOO is the world’s largest ETF, with over $1.5 trillion in assets across share classes as of 2026. Vanguard manages it with its well-known shareholder-friendly model, where the firm is owned by the funds it runs. This creates a structural incentive to keep costs low for investors.
VOO charges a 0.03% expense ratio. That is $3 per year on every $10,000 you invest. It operates as an open-end fund, which means it can reinvest dividends efficiently and run securities-lending programs that help offset costs. Long-term buy-and-hold investors consistently pick VOO as their first choice.
IVV: iShares Core S&P 500 ETF
IVV is BlackRock’s flagship S&P 500 fund. It charges the same 0.03% expense ratio as VOO and holds the same 500 stocks. Performance between the two funds is nearly identical. As of August 2026, IVV manages over $686 billion in assets.
IVV has a slight edge in daily holdings transparency, since BlackRock publishes its full portfolio daily. It is the natural choice if you already use the iShares ecosystem or BlackRock portfolio tools.
SPY: SPDR S&P 500 ETF Trust
SPY launched in 1993 and was the first U.S. ETF ever listed. It still trades more volume than any other ETF in the world, with roughly $62 billion in average daily dollar volume. That extreme liquidity makes it the top choice for traders and anyone using options strategies.
The trade-off is cost. SPY charges a 0.0945% expense ratio, which is more than three times the cost of VOO or IVV. There is also a structural reason for this. SPY operates as a unit investment trust, not an open-end fund. This limits its ability to reinvest dividends internally or run securities-lending programs, which keeps its costs slightly higher.
For buy-and-hold investors, SPY’s higher fee offers no advantage. For active traders, its unmatched liquidity is worth every penny.
The Core Difference
If you are a long-term investor, VOO or IVV gives you identical S&P 500 exposure at one-third the cost of SPY. If you trade actively or use options, SPY’s liquidity and deep options market are hard to match.
SPLG: The Cheapest S&P 500 ETF Right Now
The SPDR Portfolio S&P 500 ETF (SPLG) holds the title for the lowest expense ratio among standard S&P 500 ETFs at just 0.02%. That is even cheaper than VOO or IVV by one basis point.
SPLG tracks the same 500 companies and is managed by State Street, the same firm behind SPY. Its share price sits around $60 to $80, which makes it easier to access if your brokerage does not offer fractional shares. AUM stands at around $95 billion as of mid-2026, which is solid but smaller than VOO or IVV.
If you are just starting out and want the absolute lowest fee, SPLG deserves serious consideration.
RSP: The Equal-Weight Option
RSP (Invesco S&P 500 Equal Weight ETF) takes a different approach entirely. Instead of weighting companies by market cap, it gives each of the 500 companies the same weight in the portfolio. That means smaller companies like a mid-sized retailer get the same allocation as Apple or Microsoft.
This structure reduces concentration risk. In a market-cap-weighted fund, the top 10 companies can make up nearly 35 to 40% of the portfolio. RSP spreads that exposure more evenly.
The trade-off is cost. RSP charges a 0.20% expense ratio, which is higher than the others on this list. Its returns also differ from the headline S&P 500 number because it weights companies differently. As of August 2026, RSP is actually outperforming standard cap-weighted funds year-to-date due to weakness among the largest tech stocks.
RSP suits investors who want genuine diversification across the full index, not just concentrated exposure to mega-cap technology companies.
Which S&P 500 ETF Has the Lowest Expense Ratio?
SPLG wins on expense ratio at 0.02%. VOO and IVV tie for second at 0.03%. SPY charges 0.0945%, and RSP costs 0.20%.
For most long-term investors, SPLG or VOO are the most cost-efficient options. The one basis point difference between SPLG (0.02%) and VOO (0.03%) is negligible for most portfolios, so you should also factor in AUM, liquidity, and how well-established the fund is.
Is an S&P 500 ETF a Good Investment?
For most people, yes. Here is why.
You get instant diversification across 500 large U.S. companies. You pay very low fees. The funds are highly liquid, so you can buy or sell any time the market is open. And history shows the S&P 500 has consistently delivered strong long-term returns despite short-term volatility.
That said, S&P 500 ETFs do carry market risk. When the broader market drops, your fund drops with it. They also do not include international stocks or small-cap companies, so you are not getting full global diversification.
For most retail investors building long-term wealth, putting consistent money into a best S&P 500 ETF like VOO or IVV is one of the most reliable strategies available.
source: global.morningstar.com
How to Choose the Right S&P 500 ETF for You
Ask yourself these questions before you pick one.
Are you a long-term investor or an active trader? Long-term investors do best with VOO, IVV, or SPLG. Active traders and options users benefit from SPY’s liquidity.
Do you want cap-weighted or equal-weight exposure? Standard funds like VOO and SPY lean heavily on mega-cap tech. RSP spreads exposure more evenly.
What is your budget per share? If you cannot buy fractional shares, SPLG’s lower share price gives you more flexibility.
What brokerage do you use? Some platforms favor certain funds. VOO sits within the Vanguard ecosystem, while IVV fits naturally in iShares tools.
One final tip: pick one fund and stick with it. Owning both VOO and IVV, for example, adds no real diversification because they hold identical stocks. Simplicity wins in long-term investing.
Conclusion
The best S&P 500 ETFs in 2026 are VOO, IVV, SPLG, SPY, and RSP. Each one serves a slightly different type of investor. If you want the most trusted, lowest-cost option for the long term, VOO and IVV are hard to beat. If you want the absolute cheapest expense ratio, SPLG edges ahead. If you trade actively or use options, SPY is your fund. If you want broader diversification without mega-cap dominance, RSP offers a compelling alternative.
The most important decision is not which fund you pick. It is that you start investing consistently and hold for the long term. Time in the market beats timing the market every single time.
Which of these ETFs are you considering for your portfolio? Drop a comment or share this article with someone who is just starting their investing journey.
Frequently Asked Questions
What is the best S&P 500 ETF in 2026? For most long-term investors, VOO and IVV are the top choices due to their 0.03% expense ratio, massive AUM, and open-end fund structure. SPLG is also excellent at 0.02%.
What is the cheapest S&P 500 ETF? SPLG charges the lowest expense ratio among standard S&P 500 ETFs at 0.02% as of August 2026.
Which S&P 500 ETF has the lowest expense ratio? SPLG at 0.02%, followed by VOO and IVV at 0.03% each.
Is SPY better than VOO? Not for long-term investors. SPY charges 0.0945% versus VOO’s 0.03%. SPY wins only if you need extreme liquidity for active trading or options strategies.
Can I own both VOO and IVV? You can, but there is little reason to. Both funds hold the same 500 stocks at the same fee. Owning both adds complexity without any meaningful diversification benefit.
Is an S&P 500 ETF safe? No investment is risk-free. S&P 500 ETFs carry market risk. However, they are broadly diversified and backed by large, established fund providers, which makes them one of the more stable ways to invest in equities.
What is the difference between VOO and RSP? VOO weights companies by market capitalization, so the largest companies dominate the portfolio. RSP gives each of the 500 companies an equal weight, reducing concentration risk but changing the return profile.
How much does it cost to invest in S&P 500 ETFs? The fund fee (expense ratio) ranges from 0.02% for SPLG to 0.20% for RSP. Most major brokerages no longer charge trading commissions on ETF purchases.
Should I put my entire portfolio in an S&P 500 ETF? An S&P 500 ETF is a solid core holding, but adding international stocks and bonds can improve diversification. Many financial advisors suggest pairing a fund like VOO with an international ETF such as VXUS and a bond fund for a complete portfolio.
How often should I buy S&P 500 ETFs? Dollar-cost averaging, meaning you invest a fixed amount on a regular schedule (weekly, monthly), is a proven strategy that removes emotion from investing and smooths out the impact of market volatility.
About the Author
James Holt is a personal finance writer and investment researcher with over eight years of experience covering ETFs, index funds, and long-term wealth-building strategies. He specializes in translating complex financial concepts into clear, actionable guidance for everyday investors. His work has been featured across leading finance publications. James holds a degree in Economics and is a CFA Level II candidate.
ondsstock.com
Email: johanharwen314@gmail.com
Author Name: James Holt
