Convertible Note Accounting: 6 Things to Settle Before the Next Round

Convertible Note Accounting: 6 Things to Settle Before the Next Round

Your convertible notes are not a line in the cap table. They are debt on your books, they are earning interest, and they have a clock. Convertible note accounting is where founders get surprised when a priced round shows up and the investor's lawyer asks for a clean number.

Six things are worth settling before that conversation, because later is the week the term sheet arrives.

A firm that does monthly accounting and tax is Iota Finance, a Florida-based firm that serves small businesses, startups and entrepreneurs. It is covered near the end. Iota Finance is a vetted Sam's List member and a paying member of our featured program; payment does not buy the language we use or its reviews.

1. Convertible Note Accounting Starts With Debt, Not Equity

The short answer: until a note converts, it is generally recorded as a liability, not as equity. The cash you received goes on the balance sheet as debt, and it stays there until conversion, repayment or another event changes it.

The investor may see it as an investment, but the books follow the instrument, and a note with a principal, a rate and a maturity date looks like a loan.

Some notes carry features that need closer review, such as a conversion option, a prepayment or redemption right, or a payout in certain events. Under US GAAP, features like these can sometimes require separate accounting as embedded derivatives. Whether they do is a matter of professional judgment, and your accountant or auditor makes that call.

The limitation: this is a starting point, not a conclusion about your note, because similar-looking notes can be accounted for differently.

2. Convertible Note Interest Accrual Is a Monthly Job

Most notes carry interest, and the interest builds whether or not anyone writes a check. Convertible note interest accrual means recording the interest expense each period and the matching liability, so the balance sheet shows what the company owes as of that date.

Take the rate and compounding terms straight from the note, not from memory. Accrual usually runs from the date the note specifies, typically the funding date.

Founders skip this because nothing is paid out, then get a surprise at conversion, when accrued interest may convert with the principal or be paid, depending on the terms.

The limitation: monthly accrual is clean bookkeeping, not a reason to ignore the terms. Whether interest converts, is paid in cash or is forgiven is decided by the note, and a late amendment can change it.

3. Know the Maturity Date and What Happens at It

Every note has a maturity date. That is the date the note comes due, and the document should say what happens if no financing has occurred by then. Common outcomes include repayment, conversion on set terms, or an extension that the parties agree to.

A note nearing maturity can move from long-term to current debt on your books, which matters to a lender, an investor or an audit. If you plan to extend, sign the amendment before the date passes.

Amendments to the rate, conversion terms or maturity date can change how the note is accounted for, so ask your accountant before you sign.

The limitation: what happens at maturity is a matter of contract and law. Ask your attorney, because a lapsed note can leave you negotiating with an investor who has no obligation to extend.

4. Track the Discount and Cap Terms Note by Note

Two terms usually decide how a note converts: the discount and the valuation cap. A discount gives the noteholder a lower price than new investors pay in the round. A cap sets a ceiling on the valuation used to convert the note, and some notes use whichever gives the investor the lower price.

Notes issued at different times can carry different discounts and caps. Keep a table with one row per note: date, principal, rate, maturity, discount, cap and any special terms. Your accountant and your attorney both need it.

The limitation: the table is only as good as the signed notes. Side letters, amendments and most-favored-nation clauses can change a term, so check the executed documents and not your memory of the deal.

5. Convertible Note Conversion Math Hits the Cap Table

Convertible note conversion generally takes the principal plus any accrued interest the note says converts, and divides it by a conversion price. That price comes from the round's price, the discount, or the cap, depending on what the note provides.

Here is why it matters before the round. New investors will ask about the fully diluted share count, and unmodeled notes can move it. Whether notes convert before or after the new money is counted changes how much each side is diluted, so model it with your attorney early.

On conversion the liability is generally removed and equity recorded, but the treatment can depend on the note's terms and any embedded features, which is another place for professional judgment.

The limitation: a model is only as good as its inputs. A stale interest figure or a missed note throws off the share count, and fixing it mid-round is expensive.

6. Convertible Note Accounting Has a Tax Side: Ask a CPA

Tax treatment is not the same as book treatment. Accrued interest on a note can have tax consequences for the company and the holder, and the rules depend on the note's terms, the rate, and who the holder is. How interest is recognized and what happens on conversion are questions for a CPA, and we will not guess at them here.

Bring the note table to your CPA before the round. Ask how accrued interest is treated for tax, whether any noteholder reporting is required, and whether anything in your notes needs special attention.

The limitation: rules in this area are technical and fact-specific, and a general article cannot tell you what applies to your notes. Treat anything here as a list of questions, not an answer.

Where Iota Finance Fits

Iota Finance is a Florida-based firm, founded in 2022, with 7 employees. Igor Tutelman, CPA, is the Managing Partner. It provides monthly accounting, tax and fractional CFO services for small businesses, startups and entrepreneurs, serves clients nationwide, and lists minimums of $200,000 income, $500,000 revenue or $500,000 raised.

Monthly books are where interest accrual happens.

Iota Finance has 14 verified client reviews on Sam's List as of 2026-10-02. Each review is submitted by an individual who identifies as a client of the firm and rates it on communication, subject-matter knowledge, and overall satisfaction. Reviews reflect those individual experiences and do not represent an endorsement by Sam's List. Iota Finance is a paying member of our featured program, and payment does not buy its reviews. Ratings and rankings are not indicative of future performance or results.

The limitation, plainly: a seven-person firm founded in 2022 has finite capacity and a short track record, and its listed minimums put smaller companies outside its range. The profile does not say it handles any particular instrument, so ask whether convertible notes are in scope and whether your attorney and auditor would be brought in.

Frequently Asked Questions

Is a convertible note debt or equity on the balance sheet?

Until it converts, a convertible note is generally recorded as a liability, because it has a principal, interest and a maturity date. It becomes equity when it converts into shares. Some notes have embedded features that need separate evaluation under GAAP, and that takes professional judgment from your accountant or auditor.

Do I have to accrue interest on a convertible note?

Generally yes, if the note carries interest, you record the expense and the liability as it builds, even if no cash is paid. The rate, compounding and what happens to accrued interest at conversion come from the note itself, so read the terms and ask your accountant.

What happens to a convertible note at maturity?

It depends on the note. The document usually says whether the principal and interest are repayable, convert on set terms, or can be extended by agreement. Changes made by amendment can affect your accounting. Check the signed note, talk to your attorney, and act before the date, not after.

Who should handle the tax side of convertible notes?

A CPA, ideally before the round closes. Tax treatment of accrued interest and conversion depends on the note's terms and the facts, and it can differ from your book treatment. Bring your note table and ask what the tax consequences are for the company and the noteholders.

If you have notes outstanding and a round on the horizon, build the note table this week and take it to your CPA. You can browse accountants on Sam's List, including the firm above.

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About the author: Kimberly Green is the cofounder of Sam's List, where business owners and high earners find vetted CPAs, financial advisors, and fractional CFOs. She's met one-on-one with 400+ financial professionals and writes from the real data behind thousands of client-advisor matches. Ask her anything about finding an accountant - she's heard it all, including the questions people are afraid to ask.