Share classes are different versions of the same mutual fund that invest in exactly the same portfolio but charge investors in different ways. Each class has its own mix of front-end load, deferred sales charge, annual distribution fee and minimum investment, so each has its own net asset value (NAV) and its own returns. In the United States the most common retail classes are labelled A, C and I, with older B shares and specialist R shares for retirement plans.
Share classes let one fund be sold through many channels: commissioned brokers, fee-based advisers, workplace retirement plans and institutions. In the US, issuing several classes from one portfolio has been permitted since 1995 under SEC Rule 18f-3, which requires the fund to adopt a written multiple-class plan approved by its board of trustees. In the UK and the EU, funds also issue several classes, distinguished by charging structure, currency hedging, minimum investment or whether income is paid out or reinvested.
Share classes are like ways of paying for the same car. You can pay a large deposit and low monthly instalments, no deposit and higher instalments, or, if you are a fleet buyer, a bulk price with no extras at all. The car is identical. What differs is how much you pay, when you pay it, and who gets paid along the way.
For a fund, the "car" is the portfolio picked by the manager. The class decides whether you pay the seller upfront, a little every year, or nothing because you are paying an adviser separately. Over time, those payment choices can add up to quite different results from the same investments.
| Class | Upfront charge | Annual 12b-1 fee | Charge on sale | Typical buyer |
|---|---|---|---|---|
| A | Front-end load, often up to 5.75% for equity funds, reduced at breakpoints | Usually 0.25% | None, except on large load-waived purchases | Long-term investors buying through a broker |
| B | None | Usually 1.00% | Declining CDSC over about six years; converts to A | Largely closed to new investors |
| C | None | Usually 1.00% | Often 1% if sold within a year | Shorter holding periods |
| I (institutional) | None | None | None | Institutions, high minimums, advisory platforms |
| R | None | Varies by class | None | Employer retirement plans |
Class names are not standardised: fund families also use labels such as Advisor, Investor, Admiral, F or Z, and the same letter can mean different terms at different firms. The prospectus fee table is the authority. Class A investors can lower their loads through breakpoints, rights of accumulation (ROA) and a letter of intent. B and C shares recover their distribution cost through the 12b-1 fee and a contingent deferred sales charge (CDSC).
The choice between A and C shares is a trade-off between a one-off cost and an ongoing one. Ignoring growth, the approximate break-even holding period is:
- is the number of years after which the two classes have cost about the same.
- is the Class A front-end load as a decimal.
- and are the annual expense ratios of the C and A classes.
With a 5.75% load and expense ratios of 1.75% for C shares and 1.00% for A shares, years. An investor expecting to hold for longer than that would generally pay less in Class A, and one expecting to sell sooner would generally pay less in Class C. A larger purchase that qualifies for a breakpoint shortens the break-even period, because is smaller. Many fund families now convert C shares into A shares automatically after a set number of years, which limits the long-run cost. FINRA's Fund Analyzer lets US investors model these comparisons.
Regulation and conflicts
Because different classes pay intermediaries differently, the class an investor is placed in can reflect the seller's interest rather than the investor's. Financial Industry Regulatory Authority (FINRA) cases have targeted brokers who sold B or C shares in amounts where A shares would have been cheaper. The Securities and Exchange Commission (SEC) Share Class Selection Disclosure Initiative, launched in 2018, led investment advisers to return more than $135 million to clients who had been put in classes with 12b-1 fees without proper disclosure when cheaper classes were available. Since June 2020, SEC Regulation Best Interest has required brokers to consider costs, including share class, when recommending a fund to a retail customer.
The industry response has been a move towards "clean" shares, which carry no front-end load, no 12b-1 fee and no other payments to the selling firm, leaving the intermediary to charge its own commission or advisory fee. In 2017 the SEC staff issued a no-action letter allowing brokers to set their own commissions on such shares. In the UK, the Financial Conduct Authority (FCA) ban on commission for advised sales from 31 December 2012 produced a similar shift to clean classes, and under EU rules such as MiFID II the costs of each class must be disclosed before sale.
Because each class carries different expenses, the classes of one fund report different NAVs, expense ratios, yields and total returns, even though the underlying holdings are identical. Ratings from providers such as the Morningstar Rating are usually given per class, and a fund fact sheet often lists net assets and returns for each one separately. Investors can usually move between classes of the same fund, or between funds, under the fund's exchange privilege or conversion terms.