A $67.62 trip cost split four ways is $16.905 per passenger exactly, which cannot be paid in whole cents — dividing $67.62 into cents (6,762) by 4 gives 1,690 with a remainder of 2, so two passengers pay $16.91 and two pay $16.90, a one-cent difference that still sums to exactly $67.62 rather than a rounded total that is a cent or two short.
What is the worked four-way split of a $67.62 trip?
A trip’s fuel cost is 14.2 gallons at $3.459 per gallon: 14.2 × 3.459 = $49.1178, which rounds to $49.12 on the receipt. Adding $18.50 in tolls gives a total trip cost of $49.12 + $18.50 = $67.62. Splitting evenly among 4 passengers: $67.62 ÷ 4 = $16.905 per person — a fraction of a cent that a real payment cannot use. Converting to whole cents first avoids the problem: 6,762 cents ÷ 4 = 1,690 cents with 2 cents left over. Distributing those 2 leftover cents one at a time to two of the four passengers gives shares of 1,691, 1,691, 1,690, and 1,690 cents — $16.91, $16.91, $16.90, and $16.90 — which sum to exactly 6,762 cents, $67.62, with no rounding error.
How do I split a trip cost fairly myself?
Convert the total cost to whole cents (multiply by 100 and round), divide by the number of passengers to get a whole-cent base share and a remainder, then add one extra cent to as many passengers as the remainder requires — the rest pay the base share. This “largest-remainder” approach guarantees the shares always add back to the exact original total in whole cents, unlike rounding each passenger’s fractional share independently, which can land a cent or two short or over. The trip-cost calculator performs this fuel-plus-tolls total and even split automatically; the fuel-cost calculator checks the fuel portion alone.
How do I check a cost split adds back to the total?
A direct check: multiply the base per-passenger cents by the passenger count, then add exactly as many extra cents as passengers received one, and confirm the result equals the original total in cents. For the worked example, 1,690 × 4 = 6,760, plus the 2 extra cents distributed = 6,762 — matching the original $67.62 exactly. If the shares instead came from rounding $16.905 independently to $16.91 for all four passengers, the total collected would be $67.64, four cents over the actual $67.62 trip cost — a small but real discrepancy that the whole-cents method avoids by construction.
What mistakes produce an unfair or inaccurate split?
The most common mistake is rounding the per-passenger fractional amount up or down for everyone the same way, rather than distributing only the exact remainder — rounding $16.905 up to $16.91 for all four passengers collects $67.64, four cents more than the trip actually cost, and rounding down to $16.90 for all four collects only $67.60, two cents short. A second mistake is splitting the total before adding every cost that belongs in it — tolls, parking, and a rideshare or ferry fee are all part of a shared trip cost in the same way fuel is, and leaving one out means the “fair” split was never calculated from the true total. A third is splitting cost evenly among passengers when the trip involved unequal detours to pick up or drop off individual riders, which a flat even split does not account for at all.
What does an even cost split not decide?
This method fairly divides a stated total cost among a stated number of people; it does not decide who should count as a paying passenger (a young child, a driver who owns the vehicle, a rider who only travelled part of the route), which stage of a multi-leg trip a given passenger should be charged for, or how to value the driver’s own time and vehicle wear beyond the fuel and toll receipts entered. Those are trip-specific judgment calls the arithmetic alone cannot make.
Source for the external fact
The U.S. Internal Revenue Service sets a standard business mileage rate — 76 cents per mile for the second half of 2026 — meant to approximate the full per-mile cost of operating a vehicle, including fuel, maintenance, and depreciation together, not fuel alone, according to its standard mileage rates page; a receipts-based fuel-and-tolls split, as used throughout this guide, answers a narrower question than that full per-mile rate does.
A reference table for the same $67.62 total split among different group sizes
Each row applies the same whole-cents, largest-remainder method to the identical $67.62 total.
| Passengers | Base share | Shares with the extra cent(s) |
|---|---|---|
| 2 | $33.81 | $33.81, $33.81 (splits evenly) |
| 3 | $22.54 | $22.54, $22.54, $22.54 (splits evenly) |
| 4 | $16.90 | $16.91, $16.91, $16.90, $16.90 |
| 5 | $13.52 | $13.53, $13.53, $13.52, $13.52, $13.52 |
A second worked example with a different total and group size
A separate trip costs $54.17 total and is split three ways. Converting to cents: 5,417 ÷ 3 = 1,805 with a remainder of 2. Distributing 2 extra cents to two of the three passengers gives shares of 1,806, 1,806, and 1,805 cents — $18.06, $18.06, and $18.05 — which sum to 5,417 cents, exactly $54.17. Note that with only 3 passengers and a remainder of 2, two of the three (not one) receive the extra cent; the number of passengers paying the higher share always equals the remainder itself, never more and never fewer.
Why a flat per-mile rate is a different calculation from a receipts-based split
A 212-mile trip valued at the IRS’s 76-cent-per-mile business rate comes to 212 × 0.76 = $161.12 — a figure meant to represent the full cost of operating the vehicle for that distance, including an allowance for maintenance and depreciation, not just the fuel actually burned. That $161.12 estimate is a different number from a receipts-based fuel-and-tolls total for the same trip, and the two should not be mixed in a single passenger split: a group settling costs from actual receipts is dividing what was really spent, while a group agreeing to a flat per-mile rate is choosing to value the trip a different way entirely, closer to how a reimbursement claim is often structured.
The uneven-distance edge case: a rider who only travelled part of the route
If one of the four passengers in the original $67.62 example joined only for the return half of a round trip rather than the whole journey, an even four-way split charges them for miles they never rode. A distance-weighted alternative instead divides the total cost by total passenger-miles rather than by passenger count: if the full round trip is 240 miles and the fourth passenger only rode 120 of those miles, their fair share by passenger-miles is proportionally smaller than an equal quarter — a different, more involved calculation than the even split used throughout the rest of this guide, and one worth flagging explicitly before assuming an even split is automatically the fair one.
Rotating who absorbs the extra cent across repeated trips with the same group
The same four-person group taking four separate $67.62 trips, each split with the identical 2-cents-over-1,690 remainder, would have two of the four passengers always pay the extra cent if the same two people are chosen every time — a small but real one-cent-per-trip pattern that adds up over many trips. Rotating which two passengers absorb the extra cent evens this out: passengers A and B take the extra cent on trips 1 and 3, while C and D take it on trips 2 and 4. Across all four trips, every passenger has paid the base $16.90 share twice and the $16.91 share twice, so each of the four has paid exactly $67.62 total across the four trips — identical to what every other passenger paid, even though no single trip’s individual split was perfectly even down to the last cent.
Related calculators
Total a trip’s fuel and toll cost and split it evenly with the trip-cost calculator, check the fuel portion alone with the fuel-cost calculator, and see how a single fill-up’s cost per mile is derived in the fuel cost per mile guide.