Burn rate is just the start. Most quit calculations miss the one-time and recurring expenses that ambush you after day one.

You already know your rent and groceries. You don't know about COBRA, self-employment taxes, disability insurance, or the business tools you suddenly need. These are the expenses that turn a reasonable six-month runway into a three-month crisis.

This is not financial advice. This walks through the numbers so you can stop pretending they don't exist.

COBRA or marketplace health insurance

Your employer health plan ends the day you do. You get 60 days to pick COBRA or ACA marketplace coverage. Miss that window and you're uninsured.

COBRA continuation coverage

You pay the full employer premium plus a 2% administrative fee. Average cost for single coverage: $761–$812/month. Family: $2,100–$2,200/month.

$812/month average (single)

ACA marketplace alternative

If your income drops after quitting (freelancing, time off), you may qualify for subsidies. But if you maintain high income, expect to pay the full premium: $400–$900/month depending on age and location.

$400–$900/month (varies by income)

This is your biggest insurance surprise. Do not bury it under "miscellaneous." Make it a line item.

Self-employment tax surprise

Your employer paid half of your payroll taxes. When you freelance, you pay both halves, 15.3% of net income. That comes out of your bank account on top of federal and state taxes.

$50,000 in freelance income means $7,650 in self-employment tax alone, before the IRS wants their cut again.

Self-employment tax

15.3% of net self-employment income (6.2% Social Security + 5.8% Medicare), plus your employer's portion of Social Security/Medicare that you now pay yourself.

~$400–$800/month (depending on freelance income)

If you're freelancing, reserve 25-30% of every dollar you make for taxes. Not after expenses, before. This catches most people off-guard the first year.

Quarterly estimated taxes

The IRS wants the money four times a year, not once. April 15, June 15, September 15, January 15. They don't care that you haven't landed your next client.

Quarterly estimated tax payments

Payments due April 15, June 15, September 15, and January 15 if you're self-employed or have non-W2 income.

Variable; typically 25–30% of projected annual income ÷ 4

Non-negotiable. Set up a separate account and move money into it immediately or watch your tax bill derail your entire quit plan.

Business setup costs (if freelancing)

You need an entity (LLC or S-Corp), general liability insurance, and accounting software. All of it costs money before you make your first dollar.

LLC or S-Corp formation

State filing fees. Varies by state, typically $100-$500.

$100–$500

Business insurance

General liability or errors & omissions depending on your field. Must have it. $600-$2,000/year is standard.

$50–$167/month

Software and tools

Accounting software, invoicing, project management. Freelancers typically spend $50-$200/month. Not optional if you want tax compliance.

$50–$200/month

Dedicated workspace

Desk, chair, monitor, internet upgrade. One-time setup, then ongoing monthly costs if you're doing this seriously.

$100–$300 one-time; $20–$50/month ongoing

Loss of employer 401(k) match

Your employer gave you free money every paycheck, typically 3-6% of salary. You stop getting it the day you quit.

Employer match value

$60k salary at 4% match = $200/month gone. Not a direct expense, but the money stops showing up in your account.

$200–$400/month equivalent loss

It's not cash you spend, but it's money that no longer arrives. This matters if you were relying on that match for retirement savings.

Loss of FSA and HSA employer contributions

Some employers put money into your FSA or HSA every year. That ends when you do.

HSA employer contribution

Average employer HSA contribution runs $500-$1,500/year, or roughly $42-$125/month you'll no longer see.

$42–$125/month equivalent loss

COBRA doesn't usually offer HSA eligibility, so this money disappears if you take COBRA for health insurance.

Life and disability insurance

Your employer probably gave you free life and disability insurance. Enjoy the last paycheck, because it's gone after that.

Term life insurance

30 years old, non-smoker, $500K coverage. Runs $15-$25/month. $1M policy is $25-$40/month.

$20–$40/month

Disability insurance

Critical if you're self-employed. Replaces income if you can't work. $50-$150/month depending on coverage and income.

$50–$150/month

If anyone depends on your income or you have debt, you can't skip this.

Loss of employer-paid professional development

Your company paid for courses, certifications, and conferences. That budget line item was for you. It stops the day you quit.

Professional development

You now pay for certifications, courses, conferences, and training subscriptions out of pocket.

$100–$300/month on average

Some fields require constant learning, some don't. Engineers, marketers, accountants know the cost of staying current. Budget it as recurring, not one-time.

Corporate discounts and benefits

Your company negotiated deals on phones, software, insurance, gym memberships, and transit. Those deals vanish when you do.

Phone plan

Companies subsidize phone plans. Your bill goes up $60-$100/month without that discount.

$60–$100/month

Transit and parking

If your employer paid for transit or parking, budget that in your personal costs. Or don't if you're working from home and don't need it.

$0–$300/month depending on city

Software and tools

Microsoft Office, Adobe, Slack, Zoom, project management. Software you had free through your company costs $10-$100/month personally.

$30–$100/month

Commuting offset

If you work from home, you save on gas, tolls, and transit. Good. But if you're interviewing or relocating, budget temporary commuting costs that won't appear in your normal burn rate.

The total: what you actually need

Do the math for your situation:

  • Job searching with COBRA: +$812/month
  • Freelancing (start to finish): +$812 (insurance) +$400 (SE tax) +$100 (business) +$50 (tools) +$50 (liability) = +$1,412/month
  • Job searching plus move: +$812 (COBRA) +$40 (life insurance) +$100 (setup) = +$952/month plus $3,000-$8,000 one-time

Reality check: Most people underestimate by $1,200-$2,000/month, which is 20-40% more than their stated burn. That cuts your runway from 6 months to 4.

If your monthly burn is $5,000 and you miss $1,500 in hidden costs, your real burn is $6,500. Your six-month quit number goes from $30,000 to $39,000. That's a $9,000 gap nobody budgets for.

Go through this list. Mark what applies. Add it to your burn rate. Calculate your real quit number. The money won't save itself.

Find your exact quit date

Use the calculator , it accounts for COBRA, your burn rate, and gives you a real calendar date.

Calculate my quit date →

Sources

Internal Revenue Service. (2025). Self-Employment Tax. https://www.irs.gov/businesses/small-businesses-self-employed/self-employment-tax-social-security-and-medicare-tax-0

Internal Revenue Service. (2025). Estimated Taxes. https://www.irs.gov/businesses/small-businesses-self-employed/estimated-taxes

Kaiser Family Foundation. (2025). Employer Health Benefits Survey. https://www.kff.org/

U.S. Department of Labor. (2024). COBRA Continuation Coverage. https://www.dol.gov/agencies/ebsa/laws-and-regulations/laws/cobra

Insure.com. (2025). Life Insurance Rates.