Everyone tallies gas. Almost nobody tallies the day.
A hundred-mile commute sounds dramatic until you live it. Then it turns into background noise. Leave early. Get there late. Fill up. Do it again tomorrow. People love talking about fuel prices because that number is easy. The rest of the cost is harder to see and easier to ignore.
This post is not about quitting your job. It is about adding up what a long drive actually takes out of you so you can decide with something better than a gut feeling.
What people count
Fuel or electricity is the line item everyone remembers.
The math is simple if you use your real numbers. Miles driven times the efficiency you actually get times what you paid. Skip the brochure MPG. Skip the story where you always drive gently. Take a month of fill-ups and divide.
If you drive an EV, the gas pump becomes home charging, maybe work charging, and the occasional DC fast charge that wrecks the monthly average. Plenty of people do save money on fuel. That still is not free miles. Tires, insurance, and depreciation keep showing up.
Track only the pump or the charger and you will feel organized while the rest of the month keeps leaking money.
What the car actually costs
A long commute wears a car out differently than weekend errands.
- Miles. You are spending the car’s useful life on purpose. A vehicle that might last twelve years around town can be a five-year tool when you put a hundred miles on it most workdays.
- Tires and brakes. Highway driving is easier on brakes than stop-and-go, but the sheer volume still wins. You’ll rotate and replace sooner than your neighbor who works nearby.
- Service. Oil changes, cabin filters, and the “while you’re here” repairs show up on a faster calendar.
- Insurance and risk. More hours on the road means more chances to meet someone else’s bad day. That is probability with a deductible attached.
- Depreciation. High mileage gets awkward later whether you sell, trade, or keep the thing until it dies.
None of this means commuting is dumb. It means the car is a work tool. Tools get used up. Budget like one.
The time tax
Two hours in the car is not automatically “me time.” It is two hours you did not spend sleeping, working out, cooking something decent, or being around the people you live with.
Run it once without softening it:
- 2 hours a day, 5 days a week = 10 hours a week
- Across about 48 working weeks that is roughly 480 hours a year
That is twelve full workweeks in a seat. Some of it you can reclaim with podcasts, audiobooks, or calls you actually want. A lot of it you cannot. Calling it free because you were “already going anyway” is how people stay stuck for years.
If the job pays enough that those twelve weeks are worth it, keep the job. Just name the trade.
Soft costs that never hit a receipt
These do not show up on a credit card statement. They still bill you.
Sleep gets cut when you leave early. Tired driving is not a quirky personality trait. It is a safety problem, and it spills into how you show up at work.
Food gets worse on long days. You grab whatever is near the exit or the office fridge. Meal prep helps. Skipping it costs money and usually costs how you feel by mid-afternoon.
You also do not always arrive as the same person who left the house. Delay, weather, or one bad merge can follow you into the first meeting.
Somebody absorbs the early mornings and late dinners. Sometimes that is a partner or roommate. Sometimes it is just you running on empty at both ends of the day. Count that too.
A one-page cost sketch
You do not need fancy software. You need a page you trust.
- Monthly fuel or charging (what you actually spent)
- Car payment, or an honest opportunity cost if you own it outright
- Insurance for the commute car
- A maintenance reserve for tires, brakes, and service (take the yearly number and divide by 12)
- Parking and tolls
- Time value: hours times what an hour of your life is worth to you. Use your employer’s bill rate only if that helps you make the decision.
Add it up. Compare it to the after-tax bump from this job versus a closer role or more remote days. If the bump still wins, keep driving. If it does not, you just found your number.
Worked example (swap in your numbers)
Here is one pass with made-up but realistic assumptions so you can see the shape. This is example data, not a national average and not your spreadsheet.
Assumptions:
- 100 miles a day, 5 days a week, about 20 workdays a month → ~2,000 commute miles a month
- Gas car getting 28 mpg in real life
- Gas at $3.40 a gallon
- About 2 hours in the car each day
- You value an hour of your own time at $25 (change this; it is the most personal line on the page)
Cash costs for the month:
- Fuel: 2,000 ÷ 28 ≈ 71 gallons × $3.40 ≈ $243
- Car payment (commute car): $380
- Insurance: $140
- Maintenance reserve (tires, oil, brakes averaged): $80
- Tolls / parking: $40
Cash total: $883 a month
Cost per mile, cash only: $883 ÷ 2,000 ≈ $0.44 per mile
Now add time. 2 hours × 20 days = 40 hours × $25 = $1,000
Cash + time: $1,883 a month
Cost per mile with time priced in: $1,883 ÷ 2,000 ≈ $0.94 per mile
That is the touchpoint. Fuel alone looked like ~12 cents a mile ($243 ÷ 2,000). The fuller cash picture was closer to 44 cents. Once you put a number on your hours, you are near a dollar a mile in this example.
An EV version of the same month often drops the fuel line hard and still leaves payment, insurance, tires, and time sitting there. Do not let a cheap charging number talk you out of finishing the page.
If this job pays you more than $1,883 a month after tax compared with a closer or more-remote option, the commute can still win on paper. If it does not, the drive is funding the wrong side of the trade.
The Bottom Line
A hundred-mile day is not only a gas problem. It hits the car, the calendar, your body, and whoever shares your household schedule.
Count the pump. Count the car. Count the hours. If you want one number to remember, divide the monthly total by your monthly miles and keep both versions: cash-only and cash-plus-time. Then decide whether this job still buys the life you want, or whether fewer office days, a closer role, or a different setup would be the real upgrade.
Commutes are not automatically miserable. Treating them like they are free is how they get expensive.