Convertible Note vs Shares (Equity): Key Differences Explained

The main difference is the claim you hold. A note holder is owed money. A shareholder owns a slice of whatever the company is worth. The table compares them on what each is, who uses it, price, income, rights, legal and tax treatment, risk, resale and a typical case.

A note converts when the company raises a priced round, in which new investors buy preferred stock at a set price. The note holder usually gets a better price than the new investors. A valuation cap limits the company value used for that price, and a discount takes a fixed percentage off it.

If no round comes before the maturity date, the company owes the money back. It may repay, ask holders for more time or agree to convert anyway. A shareholder has no such date. Their shares stay shares whatever happens.

The Same $250,000, Two Ways

One investor buys $250,000 of shares today at $1.00 each. Another lends $250,000 on a note at 8% simple interest. Two years later, the company raises a Series A at $2.00, and the note’s cap sets its price at $1.00.

• Shares bought today250,000 shares, held for two years, with a vote from day one.
• Note that converts$250,000 + $40,000 interest = $290,000 ÷ $1.00 = 290,000 shares at conversion.
• If the company had failedThe note holder would have been a creditor. The shareholder would have stood last.

These numbers are illustrative. The note holder ends with 16% more shares here because interest converted at the cap price. The shareholder carried the risk as an owner for two years and held voting rights the whole time.

A note is debt, so its interest is taxable income. Interest that is built up and not paid can count as original issue discount (OID). IRS Topic 403 says OID may have to be reported each year, even if no payment is received. You can owe tax on a note before it pays you anything.

Shares are not taxed while you hold them, unless they pay a dividend. Dividends are ordinary income, and qualified dividends are taxed at the lower capital gain rates, per IRS Topic 404. When you sell, the gain is long term if you held the shares more than one year.

Startup shares can also be qualified small business stock (QSBS). The stock must come straight from a C corporation, in exchange for money, property or services. For shares bought after July 4, 2025, you can exclude 50% of the gain after three years, 75% after four and 100% after five. The cap is $15 million per company.

A note is not stock, so it is not QSBS while it is a note. Section 1202 does not say whether the clock starts when you lend or when the note converts. How the conversion itself is taxed also depends on the terms. Both questions need a tax adviser.

• While you hold itNote: interest or OID can be taxable each year. Shares: nothing, unless a dividend is paid.
• Income typeNote: interest, taxed as ordinary income. Shares: dividends, possibly at capital gain rates.
• When you sellBoth: capital gain or loss, long term after more than one year.
• QSBSNote: not stock. Shares: may qualify if all the conditions are met.

For investors, it depends on the stage. Before a company has a share price, a note lets you invest without agreeing one. You keep a creditor’s place until the round, and interest adds to your stake. Once a price exists, buying shares gives you rights, a vote and a clear stake from day one.

Employees rarely get notes. Their pay in ownership comes as shares, stock options or restricted stock units. Our guide to equity compensation explains each form. If you hold shares, the QSBS requirements are worth checking early, because the holding period runs from when you got the stock.

Convertible Note

For

No price to agree today. Interest adds to the stake. A creditor’s claim if the company fails before a round.

Against

Tax on interest that may not be paid in cash. No vote until conversion. A maturity date that can force a hard talk.

Verdict: a note suits an early investor who wants to defer the valuation question and keep a lender’s protection until a priced round. It does not suit someone who wants a vote or a stake they can count today.

Shares (Equity)

For

Ownership and rights from day one. No tax while you hold, unless dividends are paid. A possible QSBS exclusion.

Against

Last in line if the company fails. A price agreed now, which can look high later. Hard to sell while private.

Verdict: shares suit investors in priced rounds and anyone who wants a clear stake and a vote. The owner takes the full risk and the full upside, with the longest wait for a sale.

If you hold a note, find the interest rate, the maturity date, the cap, the discount and what happens in a sale before a round. When it converts, the shares can count their Rule 144 holding period from the day you bought the note, if you paid nothing extra to convert. Rule 144 sets the wait before restricted shares can be resold: six months for a reporting company, one year for others.

If you hold shares, check the class you own on the cap table. Preferred stock usually carries a liquidation preference that puts it ahead of common stock in a sale. Every note that converts later dilutes your stake.

Common Mistakes

• Treating a note as sharesUntil it converts, a note has no vote and is not QSBS.
• Missing tax on unpaid interestInterest can be taxable each year even when it is only added to the balance.
• Forgetting converting notesThey become shares at the next round and shrink every holder’s percentage.
• Assuming shares are easy to sellPrivate shares carry transfer limits and Rule 144 waits.

Convertible note

A loan to a company that earns interest and can turn into shares at a later round.

Equity

Ownership in a company, held as shares of common or preferred stock.

Maturity date

The date a note must be repaid or converted.

Valuation cap

The highest company value used to set a note holder’s conversion price.

Discount

A fixed cut to the new investors’ price that the note holder gets on conversion.

Preferred stock

The share class sold in priced rounds, with rights common stock lacks.

Original issue discount (OID)

Interest built into a debt instrument that can be taxable each year before it is paid.

Qualified small business stock (QSBS)

Shares in a qualifying C corporation whose gain can be partly or fully excluded from federal tax.

Rule 144

The SEC rule that sets how long restricted shares must be held before resale.

Every rule was last checked on November 9, 2026. Tax rules are US federal rules. The $250,000 example is illustrative arithmetic. State tax is not covered. For the version of this choice without a loan, see convertible note vs SAFE.