When the offers land, almost everyone does the same thing: compares the base salaries, picks the bigger number, and signs. It's understandable — base salary is the biggest, boldest number on the page.
It's also the most misleading number on the page.
Let me walk you through a worked example with two realistic offers. The base salaries are $15,000 apart. The actual gap, once you do the math honestly, is nearly $60,000 in year one — and roughly $234,000 over four years. Nobody would ever know that from the base salaries alone.
The trap: base salary is one line of many
An offer is a package: base salary, bonus, equity, 401(k) match, health insurance, PTO, and a dozen smaller items. Comparing two offers on base alone is like comparing two apartments by square footage while ignoring that one has no windows.
Here's the framework. For every offer, calculate four-year total comp: Year 1 total = base + (bonus × realistic payout %) + (equity vesting in year 1) + 401(k) match + quantifiable benefits. Run this for each offer. The "lower base" offer wins far more often than you'd expect.
Bonus: the target is not the payout
A "15% target bonus" means nothing until you know the payout history. If the company paid out 90% of target last year, that 15% is really 13.5%. If a startup paid 70% of a 10% target, that's a 7% bonus — less than half of what the headline suggests.
Always ask: "What did this bonus actually pay out the last two years?" It's a completely normal question. Evasive answers are a red flag — treat a non-answer as a low payout in your math.
Equity: RSUs are math, options are lottery tickets
This is where the biggest hidden gaps live.
Public-company RSUs are straightforward: shares × current stock price, vesting over four years with a one-year cliff. Discount 15–25% in your head for taxes and volatility, but it's real, countable money.
Startup options are a different animal: value = (exit value − strike price) × shares × probability of a meaningful exit. Be brutally honest about that last term. Most startup equity ends up worth exactly $0. Unless the company is late-stage with clear metrics, treat options as a lottery ticket — a wonderful bonus if it hits, not compensation.
Interrogate the mechanics: vesting schedule and cliff (four years with a one-year cliff is standard; five-year or back-loaded is a pay cut in disguise), post-termination exercise window (standard 90 days is a trap; two-plus years is far more employee-friendly), refresh grants (without them your comp quietly declines after year two), and current valuation and runway.
Benefits have dollar values — use them
A $200/month health-insurance premium difference = $2,400/year. A 6% 401(k) match on a $160k salary = $9,600/year of free money. 15 vs. 25 days PTO = two full weeks of your life, every single year. These aren't perks. They're compensation with different names, and they belong in the spreadsheet.
The worked example
Offer A (public company): $165k base, 15% target bonus, $120k RSUs over 4 years, 4% 401(k) match, 20 days PTO.
Offer B (Series B startup): $150k base, 10% target bonus, 0.15% equity (options), 3% 401(k) match, "unlimited" PTO.
Year one, counted honestly: Offer A — base $165,000; bonus $22,275 (90% payout); equity $30,000 (RSUs); 401(k) $6,600; total $223,875. Offer B — base $150,000; bonus $10,500 (70% payout); equity $0 (options valued at $0 until exit); 401(k) $4,500; total $165,000.
That's a $58,875 gap in year one from a $15,000 base-salary difference. Over four years the countable gap grows to roughly $234,000.
For the startup equity to close that gap, you'd need something like a 20x outcome and a successful exit and staying all four years. Possible — but that's the lottery-ticket framing, and you should be honest with yourself about the odds.
To be clear: there are valid reasons to take Offer B anyway. Broader scope, faster learning, a team you admire, genuine conviction in the company — all legitimate. Just don't take it because the equity "might be worth millions" without running this math first.
Before you sign anything
Two rules. First: never accept on the spot. "This is exciting — can I have a few days to review everything?" Always. Second: the first offer is rarely the best offer. A polite counter with justification works far more often than engineers expect. Pick one thing to push on (base, equity, or signing bonus); signing bonuses are often the easiest yes since they're one-time. Negotiate over email when you can: it gives you time to think, creates a record, and removes real-time pressure.
The complete system — when to discuss comp at each interview stage, the exact script for answering "what are your salary expectations" without anchoring low, five counter-offer email templates, the equity interrogation checklist, and the full list of what never to say — is in the salary negotiation guide inside The Tech Job Search Kit ($39): https://cjettoostudent.gumroad.com/l/tech-job-search-kit
Do the math before you sign. It's the highest-paid hour of your career.
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