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Firm Commitment

Last updated 8 October 2026

A firm commitment is an underwriting arrangement in which an investment bank buys an entire securities issue from the company and then resells it to investors, carrying the risk that the securities do not sell at the planned price. Because the bank has bought the paper outright, the issuer knows on pricing night exactly how much cash it will receive.

The same phrase is also used for a lender's binding promise to advance funds on agreed terms.

From the Money Master HQ dictionary, founded by Shihan Sheriff (FCMA, CGMA, CPA (Australia), MBA (General), MBA (Data Science & AI), UAECA, CAAB, CAIS; VP of Finance at Nomod, CFO at Esanjo Ventures). How these definitions are written.

On this page

What it means

In a firm commitment underwriting the bank is a principal, not an agent. It signs a purchase agreement to take the whole issue at a discount to the offer price and then sells it on, so any unsold stock stays on its own balance sheet.

That single fact drives most of the behaviour around an initial public offering, including the conservative pricing that issuers complain about. The alternative is a best efforts deal, where the bank markets the securities but takes no inventory risk and simply returns whatever it cannot place.

Best efforts arrangements are common for smaller or riskier issuers, while established companies with predictable demand can usually secure a firm commitment. The bank is paid through the gross spread, the difference between the price investors pay and the price the issuer receives.

On equity offerings the spread commonly sits somewhere between 3% and 7% of gross proceeds, and it is split between the lead managers, the underwriting syndicate and the selling group. Risk is shared by forming a syndicate, so no single bank takes the whole exposure, and further managed through an over-allotment option that lets the syndicate sell more shares than the base deal and buy them back in the market if the price falls.

These mechanics are why the underwriters push for a price a little below where they think the shares will trade. In lending, a firm commitment letter is a bank's binding undertaking to provide a facility, subject only to the stated conditions.

Acquirers rely on it to prove funding certainty to a seller, and the distinction between a firm commitment and a highly confident letter can decide who wins an auction.

In practice

Real-world examples

Example 1

A medical devices company running an initial public offering signs a firm commitment with a syndicate of four banks. The shares are priced on a Tuesday evening, the money lands two days later, and the finance team can commit to a factory build without waiting to see how trading goes.

Example 2

A utility issues $400,000,000 of ten-year bonds on a firm commitment basis. The lead bank takes the paper onto its books at a small discount and distributes it to pension funds and insurers over the following days.

Example 3

A private equity bidder attaches a firm commitment letter from its lender to a takeover offer. A rival bid backed only by an expression of interest is rejected by the board, which values funding certainty over a slightly higher headline price.

Think of it

It is like booking a non-refundable holiday package. You pay a deposit and agree to the total price. Even if your plans change later, you are legally bound to pay the full amount or lose your money.

Formula

Calculation

Net proceeds to the issuer = shares sold x offer price x (1 - gross spread percentage) Underwriter purchase price per share = offer price x (1 - gross spread percentage) A company sells 5,000,000 shares at an offer price of $20.00. Gross proceeds are 5,000,000 x $20.00 = $100,000,000. With a gross spread of 6%, the underwriting fee is 0.06 x $100,000,000 = $6,000,000, and the issuer receives $100,000,000 - $6,000,000 = $94,000,000. Put another way, the syndicate buys each share at $20.00 x 0.94 = $18.80, which multiplied by 5,000,000 shares gives the same $94,000,000. If demand collapses after pricing and the syndicate can only clear its remaining stock at $17.00, it loses $18.80 - $17.00 = $1.80 per share, or $1.80 x 5,000,000 = $9,000,000. The issuer still keeps its $94,000,000, and that asymmetry is precisely what the company is paying the 6% for.

Case study

Seen in the real world

Northvale Instruments is a fictional scientific equipment maker, used here as an illustrative example of how a firm commitment changes the conversation. Its founders wanted to list at $24.00 a share, while the underwriters argued for $20.00 on the grounds that the order book thinned out sharply above that level.

The deal priced at $20.00 for 5,000,000 shares, giving gross proceeds of $100,000,000 and, after a 6% gross spread of $6,000,000, net proceeds of $94,000,000. The founders grumbled that a $24.00 price would have raised $120,000,000 gross, but the underwriters were buying the shares themselves at $18.80 and had no appetite for a price the book would not support.

Two months later the shares traded at $23.00, which the founders read as proof they had been underpriced. Their chair made the counterpoint that the syndicate had guaranteed the $94,000,000 before a single investor paid, and that a failed $24.00 offering would have left the company with no money and a damaged reputation with the funds it needed for its next raise.

Watch out

Common mistakes

  • Thinking a firm commitment guarantees a good share price. It guarantees the proceeds at the agreed offer price, and the underwriters protect themselves by pushing that price down rather than up.
  • Confusing a firm commitment with a best efforts deal. Under best efforts the bank never takes ownership, so the issuer carries the entire risk that the offering is only partly sold.
  • Reading a commitment letter as unconditional. Almost every one carries conditions on documentation, material adverse change and completion of diligence, and those conditions deserve line-by-line review.

Questions

People also ask

Who bears the loss if the shares do not sell?

The underwriting syndicate does, because it has already bought the issue and holds whatever it cannot place.

What is the gross spread?

It is the underwriters' fee, expressed as the gap between the price investors pay and the price the issuer receives, typically a single-digit percentage of gross proceeds.

Does a firm commitment exist in lending as well?

Yes, a firm commitment letter is a bank's binding offer to lend on stated terms, and buyers use it to show a seller the money is genuinely available.

Sources and further reading

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Disclaimer

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