How Job Offer Comparison Calculator Works
The Job Offer Comparison Calculator helps you evaluate competing employment offers by converting the full compensation package into a single total-comp number you can compare apples-to-apples. Base salary is only part of the picture—equity grants, signing bonuses, 401(k) matches, health insurance premiums, PTO value, and other perks can shift the real value of an offer by tens of thousands of dollars.
For each offer, you enter the base salary, bonus target (and expected attainment percentage), equity or stock options (with vesting schedule), employer retirement match, insurance premium contributions, and any additional benefits like tuition reimbursement, commuter stipends, or wellness allowances. The tool then annualizes each component over your chosen time horizon (typically 4 years to capture full equity vesting) and applies location-based cost-of-living adjustments so you can compare a San Francisco offer against one in Austin fairly.
The calculator also factors in tax implications at a high level—showing how state income tax differences between offer locations affect your after-tax total comp. It displays results in both annual and monthly views, with a visual breakdown showing which components contribute most to each offer's value.
Use this alongside the Paycheck Tax Calculator to see the actual take-home difference, or pair it with the Rent vs Buy Calculator (Advanced) calculator if a job change also means relocating to a new housing market. The Car Lease vs Buy Calculator tool can help assess commuting cost differences between offers.
Key Terms Explained
- Total Compensation (Total Comp)
- The complete value of an employment offer including salary, bonuses, equity, benefits, and perks expressed as an annual dollar amount.
- Equity Vesting Schedule
- The timeline over which stock options or RSUs become yours, typically 4 years with a 1-year cliff.
- Cost-of-Living Adjustment (COLA)
- A multiplier that normalizes compensation to account for price differences between geographic locations.
- Signing Bonus
- A one-time payment offered upon accepting a job, sometimes with a clawback clause if you leave within a year.
- 401(k) Match
- The percentage of your salary that your employer contributes to your retirement account, usually up to a cap.
Who Needs This Tool
Comparing a high-equity startup offer against a higher-base-salary position at an established company.
Evaluating a promotion at their current company versus an external offer that includes relocation.
Understanding the real value of competing offers with different signing bonuses, equity packages, and locations.
Assessing whether a geo-adjusted salary at a remote company is competitive against a local in-office role.
Modeling complex compensation packages with deferred bonuses, performance equity, and supplemental benefits.
Methodology & Formulas
Total compensation is the sum of annualized base salary, expected bonus (target bonus multiplied by attainment probability), annualized equity value (total grant divided by vesting period in years), employer 401(k) match (salary multiplied by match percentage up to the cap), employer health insurance contribution, and monetized benefits (PTO days multiplied by daily rate, stipends, etc.). Cost-of-living adjustment uses a ratio of regional indices applied to the total. Tax adjustment subtracts estimated federal and state income tax to produce an after-tax comparison.
Pro Tips
- Always use a 4-year time horizon to capture the full equity vesting cycle—a 1-year view can make equity-heavy offers look weak.
- Discount unvested equity by 20-30% if the company is pre-IPO to account for liquidity risk and potential down rounds.
- Don't forget to value employer health insurance contributions—the difference between plans can be $5,000-$15,000 per year for a family.
- Factor in commute costs and time: a 1-hour daily commute at the IRS mileage rate adds up to $8,000+ annually.
- Ask recruiters for the bonus attainment distribution, not just the target—actual payouts often differ significantly from stated targets.