Does shrinking the delivery radius lower delivery costs?

It lowers the total mileage bill and raises the cost of every individual mile. Insurance, registration and depreciation are fixed costs that do not shrink when the radius does; they are simply spread across fewer miles. Total spend falls while cost per mile rises, and a reimbursement rate set on the old assumption now underpays.

What does this mean for a flat per-mile reimbursement rate?

A single flat rate paid across a whole roster overpays the wide-radius driver and underpays the tight-radius one, because their cost per mile genuinely differs even though they drive for the same store. The fix is to rate the driver's own miles and market rather than the roster average. The IRS standard mileage rate is $0.76 per mile effective July 1 2026, and it is a national average rather than a store-level figure.

Why a Tight Delivery Radius Costs More Per Mile

Q: Why does cost per mile rise as the radius shrinks?

A delivery car's costs split into two piles. Variable costs only occur when the wheels turn: fuel, tyres, oil, and the service intervals you reach sooner by driving further. Fixed costs accrue whether the car moves or not: the insurance premium, the registration, and depreciation, which is the money the car loses by getting a year older. Cutting miles cuts the first pile and leaves the second intact, so the fixed portion is divided across fewer miles and each one costs more.

Tightening the radius does not lower the insurance premium or the depreciation. It spreads them over fewer miles.

Ask an operator why they hold a tight delivery radius and the answer comes back fast: "Short runs are cheap runs. Fewer miles, less fuel, less wear, a smaller reimbursement check." That is fair, and the first half of it is true. Tighten the map and your total mileage bill falls, because you are buying fewer miles. The part that surprises people is the second half: the price of each one of those miles goes up, and it can go up far enough that a single flat per-mile rate stops covering what a short-radius driver actually spends. This piece names the mechanic behind that, walks the model once with every input on the table, shows what it does to a flat rate, and ends with what to change on Monday.

Name the mechanic: fixed costs do not shrink with the radius

Split what a delivery car costs into two piles. Variable costs only happen when the wheels turn: fuel, tires, oil, brakes, the service interval you reach sooner because you drove more. Fixed costs happen whether the car moves or not: the insurance premium, the registration, and depreciation, which in plain operator language is the money the car loses simply by getting a year older and a year deeper into its life. Cut the radius and you cut the first pile. The second pile does not notice.

Here is that second pile, modeled by the RatesReady cost engine for a ZIP in Grand Junction, Colorado, on a new compact sedan. Every figure is modeled by the engine, not a quote and not reported by any brand or driver: $1,934 a year for delivery-rated insurance, modeled, and $1,506 a year in depreciation, modeled. Spread the whole modeled fixed pile across 20,000 miles a year and it lands at $0.183 a mile, modeled. Variable cost on the same modeled car is $0.213 a mile. Add the two and a mile costs $0.396, modeled. Now put that identical car in a five-mile world where it covers 5,000 miles a year instead. The modeled $0.213 does not move. The modeled $0.183 does, because the same fixed dollars now divide across a quarter of the miles.

Walk the model once: one car, three radiuses

Same ZIP, same new compact sedan, same policy, same depreciation schedule. The only input that changes is annual mileage, and every figure below is modeled by the cost engine:

20,000 miles a year: $0.396 a mile, modeled. A wide radius, a driver on the road for most of a shift, fixed costs spread thin across a lot of miles.
8,000 miles a year: $0.670 a mile, modeled. Same car, same premium, roughly 69 percent more per mile than the wide-radius case.
5,000 miles a year: $0.944 a mile, modeled. The tight radius. Nearly two and a half times the modeled cost per mile of the first line.

Notice what did and did not matter. The car did not get more expensive; nobody bought a bigger vehicle, nobody had a claim, nobody changed carriers. The insurance and the depreciation are the same modeled dollars in all three rows. Only the denominator moved. That is the whole mechanic, and it runs in the direction most operators do not expect: the tighter the radius, the more each mile costs to reimburse honestly. The same arithmetic drives our delivery cost index and the state-level numbers in reimbursement rates by state.

The comparison that matters: two drivers, one flat rate

The IRS business standard mileage rate is $0.76 per mile, effective July 1 2026, raised mid-year from the $0.725 that ran from January 1; the background is in our note on the July 2026 rate increase. Hold that number still and run both drivers against it, with the cost side modeled throughout.

The tight-radius driver at 5,000 miles a year costs a modeled $0.944 a mile. Paid at $0.76, they are short a modeled $0.184 on every mile, which is roughly $920 over a year, modeled. The wide-radius driver on the identical modeled car at 20,000 miles costs $0.396 a mile. Paid the same $0.76, they collect a modeled $0.364 a mile more than the car consumed, roughly $7,280 over a year, modeled. One rate, two opposite errors, and the error is larger on the driver who looks cheapest on the schedule.

The over-payment is not free either. Reimbursement above a substantiated cost can lose its non-taxable treatment and start looking like wages, which is exactly what the accountable plan rules are about. And there is a quiet coincidence worth naming: a used midsize sedan at 8,000 miles a year prices out at a modeled $0.760 a mile, sitting exactly on the IRS rate. A flat rate is correct for roughly one combination of vehicle and annual mileage, and you do not get to pick which of your drivers happens to be standing on it.

At a tight radius, the car matters more, not less

Operators tend to assume vehicle choice stops mattering once the runs are short. The model says the opposite, because a smaller mileage base magnifies every fixed dollar. At 20,000 miles a year the modeled spread across three vehicles in the same ZIP is narrow: $0.365 for a used compact, $0.396 for a new compact, $0.455 for a used midsize, all modeled, a range of about nine cents. Drop the same three cars to 5,000 miles a year and the modeled figures become $0.848, $0.944 and $1.064, a range of about twenty two cents. The cheapest and the priciest option pull more than twice as far apart once the radius tightens. If your drivers are short-radius, what they park out front moves your true cost more than it would in a wide-radius shop, which is the practical argument in our delivery vehicle guide.

Where this stops being a fairness question

Under the federal kickback theory, a reimbursement that falls short of the driver's actual vehicle cost is treated as money handed back to the employer, and for a driver at or near the minimum wage that shortfall can push the effective wage under the floor; the mechanics are laid out in our piece on the FLSA kickback theory. The short-radius driver is precisely the profile a flat rate under-reimburses, so the exposure is concentrated where operators least expect it.

Two decisions are worth knowing by name. Parker v. Battle Creek Pizza, Inc. (6th Cir. 2024) rejected both a rigid IRS-rate-only test and loose guesswork, pointing employers toward either the IRS rate or a reasonable approximation of actual vehicle expenses; it is binding only in the Sixth Circuit, meaning Michigan, Ohio, Kentucky and Tennessee, and merely persuasive everywhere else. West v. BAM! Pizza Management (D.N.M., January 2026) is the more recent district-court treatment of the same question. The phrase that matters for a tight-radius shop is "reasonable approximation": it is a factual question about a specific driver's costs, and a driver covering 5,000 miles a year has a different answer than one covering 20,000. State law can raise the bar further, as it does under California Labor Code 2802 and in the Colorado rules.

What to change: rate the driver, not the roster

Measure annual miles per driver, not per shop. The number that sets cost per mile is the one on each individual odometer over a year, and in a tight-radius store it is usually far lower than operators guess.
Set rates in bands, by vehicle and by mileage. A tight-radius driver in an older compact and a wide-radius driver in a midsize are two different cost structures wearing one rate. Banding is the cheapest fix available.
Document the method before you need it. A reasonable approximation you can show beats a defensible number you cannot explain. Our reimbursement compliance audit walks the paperwork, and how to pay delivery drivers legally covers the pay structure around it.
Re-run the numbers whenever the radius changes. Trimming the map to protect food quality or drive times is a fine decision; it just quietly raises your true cost per mile the day it takes effect.
Do not solve it with a flat car allowance. An allowance detaches from mileage entirely, which is a different failure mode, compared side by side in car allowance vs mileage reimbursement.

If you operate Jimmy John's locations, the reimbursement mechanics for a short-radius sandwich model are covered further in our franchisee reimbursement guide, and the general method is in mileage reimbursement for delivery.

RatesReady prices a mile the way this article does: by ZIP, by vehicle, by actual annual mileage, so a tight-radius driver and a wide-radius driver each get a rate that reflects what their car really costs, with the calculation stored and exportable when someone asks how you arrived at it. It is $49 per location per month. If you want to see your own ZIPs and vehicles run through it, request a demo and we will walk the model with your numbers in it.

This article is general information and not legal or tax advice. Reimbursement obligations vary by state and by the facts of each employment arrangement; consult qualified counsel or a tax professional about your own situation.