Warrants Explained for Founders
Warrants tend to show up quietly, usually tucked into a venture debt offer or a strategic deal, and many founders sign them without fully understanding what they give away. This explainer covers what a warrant is, how it differs from a stock option, why lenders and partners ask for them, and how to model and negotiate one before it lands on your cap table.
Key takeaways
- A warrant gives the holder the right, but not the obligation, to buy shares at a set price for a set period.
- Venture debt lenders often take warrants as part of their return, alongside interest and fees.
- Warrants dilute you only if they are exercised, but you should model them as if they will be.
- The terms that matter most are coverage, share class, exercise price, term length and what happens in an acquisition.
- Track every warrant on your cap table and in your data room so no investor is surprised later.
Most founders learn about equity through founder shares, employee options and priced rounds. Warrants sit off to the side, which is exactly why they cause trouble. A warrant signed in a hurry during a debt deal can complicate a later round, an acquisition or even a simple cap table update if nobody remembers its terms.
One note before we start: this article is general information, not legal, tax or financial advice. Warrant terms and their tax treatment vary by country and by deal, so ask a startup lawyer and an accountant to review any warrant before you sign.
What a warrant is, in plain English
A warrant is a contract that gives its holder the right to buy a certain number of shares in your company at a fixed price, called the exercise price or strike price, at any time during a set period. If your company becomes more valuable, the holder can buy shares cheaply and benefit from the gain. If it does not, the holder can let the warrant expire and lose nothing beyond what they gave up to get it.
Every warrant has a few core parts:
- Number of shares, either a fixed figure or a formula, often based on a percentage of a loan amount.
- Share class, such as common stock or the preferred stock sold in your most recent or next round.
- Exercise price, the price per share the holder pays when they choose to buy.
- Term, the length of time the holder has to exercise before the warrant expires.
- Exercise mechanics, including whether the holder can do a "cashless" or net exercise, receiving fewer shares instead of paying cash.
Warrants vs stock options
Warrants and options are close cousins. Both give a right to buy shares at a set price. The difference is who holds them and why. Employee stock options are compensation for people who work for you, usually granted under an equity plan and, in the US, typically priced at fair market value based on a 409A valuation. Warrants are usually issued to outsiders, such as lenders, landlords, strategic partners or service providers, as part of a commercial or financing deal. They sit outside your option pool and follow their own contract.
Pro tip
When someone offers you a deal "with a small warrant", ask for the warrant document itself, not just a summary line in the term sheet. The details that cost you later live in the full instrument, especially the share class and acquisition clauses.
Why lenders and partners ask for warrants
The most common place founders meet warrants is venture debt. Venture debt is usually available to venture-backed startups, and lenders often take warrants as part of the package. The logic is simple: a lender to an early company takes more risk than a bank lending against property, and interest alone may not compensate for that risk. Warrants give the lender a small slice of upside if the company does well.
Warrants also appear in other places:
- Strategic partnerships, where a large customer or distributor gets warrants that vest as they hit purchase or revenue milestones.
- Bridge financing, where an investor who provides short-term money gets warrants as a sweetener.
- Service providers, such as advisers or landlords, who accept warrants in place of some cash.
In each case, the warrant is part of the price of the deal. That framing helps: you are not receiving a free favor, you are paying partly in future equity. Your job is to know how much.
How warrant coverage works
In debt deals, the size of a warrant is usually described as "coverage": the value of the warrant expressed as a percentage of the loan. A lender might propose coverage as a percentage of the committed amount, then divide that dollar figure by an exercise price to get the number of shares. The exact percentage varies widely by lender, stage and market, so do not rely on any single benchmark. Compare offers side by side instead.
Three details change the real cost of coverage:
- Committed vs drawn amount. Coverage based on the full facility gives the lender warrants even for money you never borrow. Coverage based on drawn amounts ties the warrant to what you actually use.
- Which price sets the shares. Using your last round price, the next round price, or a lower figure changes the share count significantly.
- Share class. Warrants for preferred stock carry the preferences of that class, which matters in an exit.
A simple way to model dilution
Treat warrants as if they will be exercised. Add the warrant shares to your fully diluted share count and see how ownership moves. If the result surprises you, it will surprise your next investors too, and that is better discovered before you sign.
A warrant register template
Keep one simple register of every warrant your company has issued. It feeds your cap table, your data room and every future diligence request. Copy the table below into a spreadsheet and fill it in. The rows show made-up example entries, not real terms.
| Holder | Reason issued | Shares and class | Exercise price | Expiry | Acquisition treatment |
|---|---|---|---|---|---|
| Example lender A | Venture debt facility | Example: 20,000 Series A preferred | Example: $1.50 per share | Example: 10 years from issue | Exercised or cashed out at closing |
| Example partner B | Distribution agreement, vests on milestones | Example: 10,000 common | Example: $0.40 per share | Example: 5 years from issue | Expires if unexercised before closing |
| Example bridge investor C | Bridge note sweetener | Example: shares of next round class, by formula | Example: next round price | Example: 7 years from issue | Converts per warrant terms |
Add a column for the document location and another for any approvals given, such as the board resolution that authorized the issue. When an investor asks "are there any warrants outstanding?", you can answer in one minute.
How to negotiate warrant terms
Warrants are often presented as standard, but most of the terms are negotiable, especially if you have more than one offer. Work through these steps with your lawyer.
- Get the full document early. Ask for the warrant instrument alongside the loan or partnership agreement, not after the main terms are agreed.
- Translate it into shares. Calculate the share count under a few scenarios: today's price, a higher next round and a flat round. Note the ownership percentage each time.
- Push on coverage basis. Ask for coverage tied to drawn amounts rather than the full commitment, or for warrants that issue in tranches as you draw.
- Check the share class. Common stock warrants are usually less costly to you than warrants on preferred stock with liquidation preferences.
- Review the term and expiry. Longer terms give the holder more time to benefit. Ask what happens at expiry and whether the warrant ends early in an acquisition or IPO.
- Read the acquisition clause. Decide whether the warrant must be exercised, cashed out or assumed by the buyer. Messy acquisition terms can slow a sale.
- Get board approval and record it. Issuing a warrant usually needs board approval. Update your cap table and register the same week.
Hypothetical example
Priya runs a B2B software startup that raised a seed round last year. In September she is comparing two venture debt offers. Lender one proposes coverage on the full facility with warrants for preferred stock. Lender two proposes slightly higher coverage but only on amounts drawn, for common stock. Priya models both on her fully diluted cap table. Because she expects to draw only part of the facility before her next round, lender two's offer dilutes her less in every scenario she runs. She uses that model to ask lender one to match the drawn-amount basis, then picks the better overall package. All figures and names here are made up; the method is the point.
Common mistake
Leaving warrants off the cap table because they are "not real shares yet". Investors in your next round will count them in the fully diluted share count, and an acquirer's lawyers will find them in diligence. Missing warrants make your numbers look wrong at the worst possible moment.
Warrants in later rounds and exits
Warrants keep mattering long after you sign them. In a new priced round, investors will ask for every outstanding warrant and include them in the price per share calculation. That means warrants you issued earlier can slightly reduce the price new investors are willing to pay per share, since the same valuation is spread across more potential shares.
In an acquisition, the buyer will want a clean cap table at closing. Depending on the warrant terms, holders may exercise and receive deal proceeds, receive a cash payment for the value of their warrant, or see the warrant expire. Clear acquisition language avoids last-minute negotiation with a holder who has leverage because their consent is needed.
Tax treatment of warrants for both the company and the holder can be complex and differs between the US, the UK and Europe. This is one area where a short conversation with an accountant before issuing saves real cost later.
Pro tip
Add a "warrants" folder to your data room with the instrument, the board approval and a one-line summary for each holder. When the fall fundraising season gets busy, investors move faster through clean data rooms.
Your warrant checklist
- Ask for the full warrant document before agreeing main deal terms
- Convert coverage into a share count under at least three scenarios
- Prefer coverage on drawn amounts and common stock where possible
- Confirm the exercise price, term, expiry and cashless exercise rules
- Agree clear treatment in an acquisition or IPO
- Get board approval and record the issue the same week
- Add every warrant to your cap table and warrant register
- Store the documents in a dedicated data room folder
Frequently asked questions
Do warrants dilute founders?
Only when they are exercised, but you should plan as if they will be. Investors count outstanding warrants in the fully diluted share count, so warrants affect ownership math in every future round even before anyone exercises.
Is a warrant the same as a stock option?
They work in a similar way, since both give the right to buy shares at a set price. Options are usually employee compensation granted under an equity plan, while warrants are typically issued to outside parties such as lenders or partners as part of a deal.
Can I refuse to give warrants to a venture debt lender?
You can ask, but many venture lenders treat warrants as a standard part of their return. A more practical approach is to negotiate the coverage basis, share class and term, and to compare the total cost across several offers.
What happens to warrants if my company is sold?
It depends on the warrant terms. Common outcomes are exercise before closing, a cash payment for the warrant's value, assumption by the buyer, or expiry. Make sure your documents spell this out so the sale is not delayed.
Related reading
The bottom line
Warrants are a normal part of startup finance, especially with venture debt, and they are not something to fear. They are something to price. Turn every proposed warrant into a share count, model it on your fully diluted cap table and negotiate the terms that change its real cost.
Keep a clean register, get board approval and store every document where your next investor can find it. Do that, and warrants stay a small, well-understood line on your cap table instead of a surprise in your next round.
