Salary Negotiation Calculator: Can You Afford to Negotiate?

Why a small gap becomes a big number

It's tempting to treat a €2,000 or €5,000 difference as a rounding error — a few months of saving, no big deal. It isn't, and the reason is compounding. Almost every raise you'll ever get is calculated as a percentage of your current salary, so a 3% raise on €55,000 is bigger than 3% on €50,000 — and that advantage repeats every single year. Two people who start €5,000 apart and get identical percentage raises don't stay €5,000 apart: the gap widens annually and never closes.

Worse, your next job's offer is usually anchored to your last salary. A low starting number doesn't just cost you at this job — it follows you to the next one. That's why the calculator sums the gap across the whole horizon you set: it's showing you the lifetime shape of a one-time decision, not just this year's paycheck.

Runway is your real leverage

Whether you should accept, counter, or keep looking comes down to one question most people never quantify: how long can you afford to say no? That's your runway — your available savings divided by your monthly expenses. It's the single best measure of your negotiating power, because the person who can walk away always holds the stronger hand.

• Lots of runway (3+ months): counter confidently at your market rate, or decline and keep searching for a better fit. Use the leverage.
• Some runway (1–3 months): enough to negotiate firmly. Ask for your market rate — the worst realistic outcome is they hold at the original number.
• Little or no runway: secure the offer first, but still ask. A polite counter rarely costs you anything, and even a partial win compounds for years.
• The calculator turns your savings and expenses into a month figure and tailors its verdict to it.

How to read your result

Enter your offer, your market rate, an expected annual raise, and how long you'd realistically stay. The tool returns four things:

• The headline: total income you'd forgo over your horizon by accepting the gap instead of market — the real stakes of the decision.
• Gap by year N: how far apart the two salaries are at the end, after compounding — usually far bigger than today's gap.
• Difference per month: the same gap in the take-home terms you feel immediately.
• Suggested counter: anchor at your market rate. Asking for the top of a reasonable range is normal and expected, not greedy.

How to actually negotiate the offer

Knowing the number is half of it. Here's how to ask for it without friction:

• Lead with enthusiasm: make it clear you want the job, then frame the number as the one open question.
• Anchor at your market rate with a brief, factual justification — your research and what you bring, not your personal budget.
• Negotiate the whole package: if base won't move, trade for a signing bonus, an earlier review, extra leave, or remote days.
• Get the final offer in writing before you resign anywhere.

What if you genuinely can't afford to wait?

Sometimes the runway is empty and you need the income now. Taking the offer is a completely rational choice — but you can still protect your future self:

• Still send one polite counter. The downside is near-zero and the upside compounds.
• If base is fixed, negotiate a written six-month review tied to specific goals, so the correction comes sooner.
• Treat the role as a bridge: the fastest way to reset a low salary anchor is to change employers, where market-rate offers — not internal percentage raises — set your new base.

The honest caveats

This is a planning tool, not financial advice. It works in gross figures, assumes your raises stay a percentage of base, and can't know your tax situation, your benefits, or the non-money reasons a job might still be worth taking. Use the number to understand what's at stake and to give yourself permission to ask — not as a guarantee of any outcome.