Software Engineer Coast FIRE: When Can You Stop Contributing?

FIRE Number

$2.1M

Target Retirement Age

Years to FIRE

Monthly Savings Needed

$1K

Software engineers are uniquely positioned for Coast FIRE due to high total compensation and early career income. With median TC at major tech companies running $150K–$400K+ including RSUs, a SWE can reach the Coast FIRE number of $387K in as little as 5–8 years of disciplined saving. Coast FIRE at 40 on a tech salary means 25 years of hands-off compounding carrying the portfolio to $2.1M by 65 — with zero required contributions after 40.

The SWE Coast FIRE number of $387K is the present value of a $2.1M FIRE target (supporting $7,000/month in retirement spending). Reaching $387K by age 40 from a starting portfolio of $100K at age 30 requires saving approximately $1K/month — roughly 12% of a $180K salary. For SWEs maxing their 401k ($23,500/year) plus an RSU reinvestment strategy, this threshold is often reached before their target date.

Coast FIRE is particularly appealing in tech because it enables strategic career moves after 40. Once contributions are no longer needed, a SWE can take lower-paying roles at startups, move to non-profit tech, go independent (at reduced rates), or de-prioritize RSU compensation in favor of flexibility. The portfolio grows untouched in the background while the SWE optimizes for life quality rather than income maximization.

RSU management is critical to SWE Coast FIRE. RSUs vest as ordinary income — at 32–37% marginal rates for many SWEs. Sell RSUs immediately upon vesting and redirect to a diversified index fund portfolio rather than holding concentrated employer stock. A SWE who holds $200K in employer RSUs and the stock drops 60% has lost $120K of Coast FIRE progress. Diversify immediately; your Coast FIRE number should not depend on a single stock performing.

Frequently Asked Questions

What is the Coast FIRE number for a software engineer?expand_more

For a $2.1M FIRE target ($7,000/month in retirement), the Coast FIRE number at age 40 is $387K. At 7% real returns over 25 years, that compounds to your full FIRE target by 65. SWEs targeting higher spending ($10,000/month = $3M FIRE number) would need $553K by 40.

How fast can a software engineer reach Coast FIRE?expand_more

A SWE earning $180K+TC saving 20–25% of gross ($36K–$45K/year) can typically reach $387K in 5–8 years from a $100K starting portfolio. At $300K TC with a 30% savings rate ($90K/year), the coast threshold is reachable in 4–5 years from nearly any starting balance.

Should a SWE use mega backdoor Roth before coasting?expand_more

Yes, if available. Mega backdoor Roth lets SWEs contribute up to $69,000/year ($23,500 pre-tax + up to $46,000 after-tax converted to Roth) at companies like Google, Microsoft, and Meta. All those dollars count toward your Coast FIRE number and provide tax-free growth. This significantly accelerates the path to $387K.

Can I coast at 35 on a software engineering salary?expand_more

Yes — Coast FIRE at 35 requires $276K ($2.1M ÷ 1.07^30). With 30 years of compounding, the coast number is smaller. A SWE starting at 27 with high TC can reach $276K in 8 focused years. The downside: 30 years is a long time to trust 7% returns — a more conservative 5% assumption suggests a higher initial target.

What do I do with my 401k contributions after hitting Coast FIRE?expand_more

Keep contributing at least enough to capture the employer match — that's effectively a 100% return before any investment growth. After your coast threshold, redirect above-match contributions toward quality of life, career flexibility, or an emergency fund rather than additional retirement saving. The match itself may add modestly to your portfolio, giving you extra compounding buffer.

Frequently Asked Questions

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