A $75 Bus Pass Saves $4,344 a Year and Your Bike Burns 350 Calories on the Same Commute

Car commute costs $454/month. Transit pass: $125. Bike: $29. Carpooling 3 people: $18 each. Three calculators compare every option with real numbers.

The spreadsheet had three columns. Column A: car. Column B: bus pass. Column C: bicycle. The numbers were not close.

A project manager at a mid-size company ran them after moving to a new apartment 15 km from the office. The old apartment was 4 km away - walking distance, no transport cost. The new one forced a decision. Buy a parking spot downtown? Upgrade the car insurance? Or try something different?

The answer came from three calculators and one Saturday morning with a coffee. This article walks through the same exercise, step by step, with the exact inputs and outputs.

Stage 1: The car baseline - $454.48 per month

The starting point. A compact gasoline car, 8 L/100 km in city traffic, fuel at $1.60/L. The commute: 15 km one way, 22 days per month.

Fuel alone: $84.48. That is 660 km at 8 L/100 km = 52.8 liters at $1.60.

But fuel is barely a fifth of the real cost. Add the rest:

Item	Monthly
Fuel (660 km)	$84.48
Parking (downtown garage)	$150.00
Insurance	$120.00
Service (1/12 of $1,200/year)	$100.00
Total	$454.48

Annual car cost: $5,453.76. And that does not include depreciation, which would add another $2,000-5,000 depending on the car.

Public Transport vs Car Calculator showing $454.48 car cost vs $125.00 transit cost per month on a 15 km commute

The Public Transport vs Car Calculator produced these numbers in about 30 seconds. The parking figure hurt the most - $150 per month for a concrete rectangle.

Stage 2: The bus pass - $125 per month

A monthly transit pass in this city: $75. That covers every bus, tram and metro line, unlimited rides. No parking, no insurance, no service appointments.

The catch: occasional late-night Uber rides when the bus stops running. Budget $50 per month for those. Total: $125 per month.

Annual transit cost: $1,500. Savings versus the car: $3,953.76 per year.

One number jumped out from the comparison table: the cost per trip. Car: $20.66 per round trip. Transit: $5.68. Every single workday, the car costs $15 more than the bus. Over 22 days, that compounds fast.

The downside? Commute time. The car takes 60 minutes door to door (with parking). Transit takes 120 minutes - two buses and a short walk. That is an hour of extra commuting per day. Whether that hour is "wasted" depends on what you do with it. Reading, podcasts, catching up on messages - or just staring out the window.

Stage 3: The bicycle - $29 per month

This is where the numbers got interesting.

A commuter bike at $800, amortized over 4 years: $16.67 per month. Annual service (tune-ups, tires, chain): let us say $150 per year, generous. That is $12.50 per month. Total: $29.17 per month.

Wait. $29?

Bike vs Car Calculator showing $446 car cost vs $142 bike cost per month for a 10 km commute with 350 kcal burned daily

The Bike vs Car Calculator confirmed it. Even with a generous $1,500 annual bike service budget (which is far more than most cyclists spend), the bike costs $141.67 per month. With a realistic $150/year service, it drops to $29.

Annual savings versus the car: $3,654 to $5,100 depending on service assumptions.

The bonus line in the results: 350 kcal burned per day cycling 20 km round trip. Over 20 commuting days, that is 7,000 kcal per month - roughly a kilogram of body fat. No gym membership required.

The realistic limit? Distance. A 10 km one-way commute takes about 33 minutes at 18 km/h. Manageable. At 15 km, the ride stretches to 50 minutes. At 20 km, most people switch to an e-bike or combine with transit.

Stage 4: Carpooling - $18 per person

The third option emerged from a lunch conversation. Two coworkers live in the same suburb. They drive the same route every day, separately, in three separate cars.

A 350 km weekly total (round trips, 5 days), 7 L/100 km, $1.50/L. Solo: $36.75 in fuel plus $15 in highway tolls = $51.75. With 3 riders, each pays $17.25.

Carpooling Cost Calculator showing $25.88 per person for a 350 km trip with 2 riders

The Carpooling Cost Calculator generates a scenario table for 2-5 riders. The savings scale linearly:

Riders	Cost per person	Savings vs solo
2	$25.88	50%
3	$17.25	67%
4	$12.94	75%
5	$10.35	80%

For a daily commuter doing 30 km round trip with 3 people, the monthly fuel cost drops from $69.30 solo to $23.10 each. Annual savings: $554 per person - on fuel alone, before parking and insurance.

Quick reference for common distances - cost per person with 3 riders at 7 L/100 km:

Carpooling 50 km - $1.75 per person
Carpooling 100 km - $3.50 per person
Carpooling 200 km - $7.00 per person
Carpooling 300 km - $10.50 per person
Carpooling 500 km - $17.50 per person
Carpooling 800 km - $28.00 per person
Carpooling 1000 km - $35.00 per person

The full picture - all four options side by side

	Car (solo)	Transit	Bike	Carpool (3)
Monthly cost	$454	$125	$29	$23 (fuel only)
Annual cost	$5,454	$1,500	$350	$277 (fuel only)
Commute time (15 km)	60 min	120 min	50 min	60 min
Parking needed	Yes	No	No	Yes (1 car)
Weather dependent	No	No	Partially	No
Calories burned	0	0	350/day	0
CO2 per month	122 kg	~0 kg	0 kg	41 kg

The bike wins on cost. Transit wins on simplicity. Carpooling wins on cost-per-minute (same speed as a car, fraction of the price). Solo driving wins on nothing except flexibility.

Five lessons from this exercise

Lesson 1: Parking is the silent killer. At $150/month, parking alone exceeds the entire transit budget. If your workplace offers free parking, the car math improves. If it does not, the car math collapses.

Lesson 2: Insurance and service run whether you drive or not. A parked car still costs $220/month in insurance and service. That is the minimum "ownership tax" before you turn the key.

Lesson 3: The bike pays for itself in 6 weeks. An $800 commuter bike, replacing a $454/month car commute, reaches break-even in 1.8 months. After that, every ride is essentially free plus exercise.

Lesson 4: Carpooling requires exactly one thing - a coworker nearby. The logistics are simple. The savings are real. The main barrier is finding someone with the same schedule and route. Company Slack channels and bulletin boards solve this.

Lesson 5: Mixing modes beats any single option. Bike in summer, transit in winter, carpool on meeting-heavy days. The cheapest commuter is not the one who picks one mode - it is the one who picks the right mode each day.

Tools discussed in this article

Public Transport vs Car Calculator - Compare monthly transit pass cost with full car ownership. Enter pass price, distance, fuel, parking and insurance for a side-by-side monthly and annual comparison.

Bike vs Car Calculator - Compare cycling and driving costs with calories burned per day. Enter distance, car expenses and bike price for savings breakdown and CO2 reduction.

Carpooling Cost Calculator - Split fuel and toll costs between 2-5 riders on any distance. See cost per person, savings vs solo driving and a scenario table for every group size.