Why Your Commute Costs More Than You Budgeted For
A commute budget typically runs over because vehicle depreciation and maintenance costs from the added mileage were left out of the original estimate entirely, parking or tolls weren't fully accounted for (or increased since the original budget was set), or actual fuel prices and driving patterns (traffic, detours) differ from the assumptions used in the original estimate.
This gap is common precisely because the most visible commute cost (fuel) is also the one most people budget for, while the less visible costs (covered in the true-cost guide) are easy to leave out entirely.
Leaving out vehicle wear entirely
A budget based purely on fuel cost, without accounting for the accelerated maintenance and depreciation from the added commuting mileage, significantly understates the true cost — this specific gap, covered in detail in the true-cost guide, is the single most common reason a commute budget runs over.
Parking and tolls increasing or being underestimated
Parking rates and toll pricing can increase over time without necessarily prompting an active recalculation of the commute budget — an outdated estimate for these specific costs is a common, fixable source of budget overrun.
Fuel prices and driving patterns changing
Fuel prices fluctuate, and real-world driving conditions (traffic, detours, seasonal route changes) can differ from an original clean-mileage estimate — periodically recalculating with current fuel prices and actual typical driving conditions keeps the budget aligned with reality.