I Ran a Financial Independence Calculator
Plugged my actual numbers into a FIRE calculator. It said age 53.
The Words "Financial Freedom" Got Me
On the subway home, a YouTube video about FIRE (Financial Independence, Retire Early) played. "Save 300 times your monthly expenses and you're financially free." The 4% rule. If 4% of your assets covers a year of living expenses, theoretically you never need to work again.
Theoretically.
I opened a calculator immediately.
My Numbers
Calculated average monthly expenses from the last 6 months:
| Category | Monthly Average |
|---|---|
| Housing (jeonse interest) | 450,000 won |
| Food | 680,000 won |
| Transport | 112,000 won |
| Phone/Internet | 67,000 won |
| Insurance | 135,000 won |
| Subscriptions | 43,000 won |
| Other (clothes, culture, etc.) | 380,000 won |
| Total | 1,867,000 won |
About $1,360/month or $16,300/year. Add travel and unexpected expenses: roughly 28 million won annually ($20,400).
4% rule: 28M / 0.04 = 700 million won ($510K).
I need $510K to be financially free. (Stared at the number for a while.)
How Do You Save $510K?
Current net worth: about 120 million won (~$87K). Jeonse deposit minus loans, plus small stock portfolio and savings. Subtract student loan balance of 7.3 million won.
Monthly savings capacity: about 1.8 million won ($1,300). After taxes and living expenses from my salary.
Assuming 7% annual returns (S&P 500 long-term average is about 10%, being conservative): compound interest calculator says roughly 18 years.
I'm 29. So age 47. But that assumes expenses don't increase and income stays flat -- wildly unrealistic. Get married? Have kids? Monthly expenses could double.
Realistic scenario: family expenses of 3.5M won/month, target 1.05 billion won, savings of 2M/month (factoring salary growth). Result: 24 years. Age 53.
53. Does this qualify as the RE in FIRE? Unclear.
The Calculator's Trap
These calculations are dangerous because numbers coming out makes it feel like there's a plan. But reality has too many variables.
Inflation. At just 3% annually, expenses in 20 years are 1.8x today's. Need 1.26 billion won instead of 700 million.
Health. A serious illness in your 40s breaks everything.
Parents. Elder care costs could appear.
Factor everything in and the calculator pushes to 60, 65. Which just means "work until retirement." Standard retirement.
But the Exercise Was Still Worth It
I didn't do this to get depressed. There were genuine benefits.
First, savings discipline strengthened. "Must deposit 1.8 million every month without fail" became a concrete target.
Second, unnecessary spending got cut. Of the 43,000 won in subscriptions, I cancelled a Netflix account I wasn't watching. Saves 17,000 won/month. Over 20 years of compounding, that adds up. (In theory.)
Third, I rethought the definition of "financial freedom." Not necessarily never working again -- just doing only what you want. In that case, 700 million won isn't the magic number. Cover minimum expenses with some income stream and you're there.
The Developer Angle
What about freelance development on the side? An extra 1 million won/month would drop the target asset to 450 million. But realistically, do I have the energy to freelance after work? I'm the person who turns on Netflix the moment I get home.
Blog monetization crossed my mind too. Current monthly revenue: 0 won. Ads might bring in 50,000 won/month. That's too embarrassing to plug into a compound interest formula.
The Realistic Plan
Forget grand FIRE. Small target: net worth of 300 million won by age 35. If I hit that, recalculate.
Started tracking expenses. Installed a budget app. Three days in and it's already annoying. But if I don't know where money goes, it's not a plan -- it's a wish.
The calculator saying "retire at 53" isn't exactly motivating. But "save 1.8M monthly and you could hit 47" feels like something worth pushing for. Six-year difference, but the emotional gap is huge.