Offer Letter

An offer letter is the written employment offer extended by a company to a candidate, documenting the terms of the employment relationship. The document covers role and title, base compensation, equity grant (typically subject to subsequent board approval and stock option agreement), variable compensation if applicable, benefits eligibility, start date, at-will employment status (in most US states), reporting structure, and any role-specific terms (relocation assistance, signing bonus, special vesting). It is the closing document of the hiring process that the candidate signs to accept the role, and establishes the contractual basis for the employment relationship going forward. It is the legal anchor of every new employment relationship and a document that should be drafted carefully because errors compound.

The standard elements of an offer letter:

Role specifications:

• Title: official job title at start.
• Reporting structure: who the employee reports to.
• Job description: usually attached as exhibit or referenced.

Compensation:

• Base salary: annual base salary, payment frequency (typically bi-weekly), and any salary adjustments at defined intervals.
• Equity grant: number of options/RSUs (subject to board approval), strike price (subject to 409A at grant), vesting schedule (typically 4 years with 1-year cliff), and reference to the equity plan.
• Variable compensation: if applicable, bonus structure, commission plan, sign-on bonus.
• Benefits eligibility: medical, dental, vision, 401k, PTO, parental leave. Often referenced rather than detailed.

Employment terms:

• Start date: when employment begins.
• Employment status: full-time, part-time, contractor. For US employees, at-will employment language (in most states).
• Conditions of employment: typically subject to background check, reference checks, employment eligibility verification (I-9), and signing other required documents (PIIA, arbitration agreements).
• Term: at-will (US default) or fixed-term (some international jurisdictions).

Legal elements:

• At-will employment language: in most US states, explicit statement that employment is at-will (can be terminated by either party for any lawful reason, with or without notice).
• Confidentiality acknowledgment: reference to a separate Proprietary Information and Inventions Agreement (PIIA) that the employee will sign.
• Other required acknowledgments: handbook receipt, drug testing policy, etc., per company practice and jurisdiction.
• Governing law: which jurisdiction's law applies.

The PIIA (Proprietary Information and Inventions Agreement):

• Separate document but typically signed alongside the offer letter.
• Assigns inventions created during employment to the company.
• Establishes confidentiality obligations.
• Critical for IP ownership; do not skip.

Common offer-letter pitfalls:

• Missing at-will language: in US states where at-will is default but should be explicit, missing language creates ambiguity about termination rights.
• Vague equity terms: "equity to be determined" or "equity per company practice." Should specify share count, vesting, and any acceleration provisions.
• Inconsistent terms across offers: different offer letters using different language for similar roles creates equity issues. Use templates with intentional variations only.
• Verbal modifications not documented: candidate negotiates a change verbally with a recruiter; change isn't in the offer letter. Document everything.
• Missing acceleration provisions: for senior hires, missing single/double-trigger acceleration language can create issues later.

What founders get wrong: Treating offer letters as administrative documents to copy from a template without careful review, or making verbal modifications that don't make it into the written letter. The right discipline: standardize offer-letter templates with employment counsel, document everything in writing including any negotiated terms, be explicit about equity (share count, vesting, acceleration provisions), reference the PIIA, and use consistent language across similar roles. For senior hires, invest extra time in getting acceleration provisions and other equity terms right upfront.

Related: Job Description · Recruiting Strategy · Employee Handbook · Stock Option · First Hire

FAQ

What is an offer letter?
The written employment offer extended by a company to a candidate, documenting the terms of the employment relationship (role, compensation, equity grant, start date, at-will status, reporting structure, and role-specific terms). The closing document of the hiring process that the candidate signs to accept the role.

What's the difference between an offer letter and an employment agreement?
In the US, "offer letter" typically describes the document for at-will employment relationships with US-based employees. "Employment agreement" typically describes more comprehensive contractual documents, often used for executive hires, international employees, or fixed-term arrangements. The line between them is blurry; the substantive content is similar.

What is the PIIA?
The Proprietary Information and Inventions Agreement, a separate document signed alongside the offer letter. Assigns inventions created during employment to the company and establishes confidentiality obligations. Critical for IP ownership; do not skip. Should be signed before the employee starts work, not after.