The Commute Test
The math behind the 'cheaper house further out' decision
That house 30 minutes further out is $40,000 cheaper. Before you sign, run the real math on fuel, time, and wear — because the 'deal' might cost you more than you saved.
Let's say you're choosing between a $350,000 home 10 minutes from work and a $310,000 home 40 minutes away. The $40,000 savings looks compelling. But over a 30-year mortgage, that's about $190/month in principal and interest. Now let's look at what the commute actually costs.
An extra 60 minutes of driving per day (30 each way) adds up to roughly 250 hours per year. At the IRS standard mileage rate, an additional 30 miles per day costs around $200–$250/month in fuel and vehicle wear. Add in the value of your time — even at a conservative $20/hour — and you're looking at another $400+/month in real cost.
That's $600–$650/month in commute costs to save $190/month on your mortgage. The math doesn't work. And that's before you factor in the stress, the time away from family, and the wear on your vehicle over years of daily driving.
The commute test isn't about telling you where to live. It's about making sure you're comparing the right numbers. Sometimes the further-out house still wins — lower taxes, better schools, more space. But run the full calculation first, not just the sticker price.
Key Takeaways
- A longer commute adds real monthly costs in fuel, wear, and time
- Compare total monthly cost, not just mortgage payment
- 60 extra minutes of driving daily can cost $600+/month in real terms
- Location tradeoffs are personal — just make them with the full picture