The UCR vehicles screen: MCS-150 autofill vs counting it yourself

Option A and Option B — the choice at the top of the screen

Before you type a number, the portal asks how you want to answer. These are not two labels for the same thing; they draw on different data, and for a carrier whose fleet has moved they can produce different totals and therefore different fees.

A practical way to decide: if the MCS-150 "Last Updated" date is inside the last year and the fleet has not moved since, take Option A and save yourself the arithmetic. If the date is old, or you have sold or parked units since, work the count out yourself and use Option B — or, better, update the MCS-150 first so the federal record and the registration agree.

The 12-month window is fixed, and it is not the last 12 months

Option B asks about a specific period, and the period does not move with the date you file. It ends the June before the registration year. For 2027, that is July 1, 2025 to June 30, 2026. The 2026 registration year asked for July 1, 2024 to June 30, 2025 — the same rule, one year back.

Three consequences follow from that, and each of them catches somebody out. First, a truck you bought in August — after the window closed — is not part of this year's count, even though you are running it today. Second, a truck you sold in March, inside the window, was operated during the window and generally does belong in the count. Third, registering in October and registering in December produce exactly the same answer, because the window does not shift. The question is genuinely "what did you operate during those twelve months", not "what do you have in the yard".

What the screen actually asks for

Underneath the Option A / Option B choice, the count is split in two, followed by a question most people click past.

Trailers never count

UCR is priced on power units — self-propelled commercial motor vehicles. Trailers, semi-trailers, dollies and converter gear are not power units and are never part of the total, no matter how many of them are titled to the business or listed on the insurance schedule.

This sounds obvious and is the most expensive misunderstanding in the programme, because of where people get their numbers from. A carrier who works off an equipment list, an insurance schedule or a fixed-asset register sees every unit in one column, adds them up, and lands somewhere far above their real count. Eight tractors and twenty-two trailers is a vehicle count of eight, not thirty — and those two answers sit in different brackets with a difference of $830 between them. Count what moves under its own power. Nothing else.

The add-or-exclude question, and the bracket it can save

Below the two count boxes, the portal asks whether you need to add or exclude any commercial motor vehicles. It is one line, it defaults to the quiet answer, and it is the most common place a carrier overpays by a full bracket.

What comes out here, most often, are vehicles used exclusively in intrastate commerce. UCR is a registration for interstate operation; a unit that never participates in interstate commerce is generally excludable from the count. Think of the dedicated in-state delivery truck at a mixed fleet, the yard unit that never leaves the county, or the local straight truck on a purely intrastate contract while the tractors run over the road.

What the Vehicle Total is worth — the 2027 brackets

One fee covers the whole fleet for the year. It is not charged per truck, which is why the brackets behave as steps rather than a rate: inside a bracket an extra unit costs nothing, and at the top of one it costs the entire width of the next.

Government fee amounts are set by federal rulemaking and are adjusted between registration years — confirm the current amounts on UCR.gov before you pay. The portal adds its own convenience fee on card and ACH payments.

Where one truck changes the fee

Because the brackets are steps, the cost of a single power unit depends entirely on where you are standing. Go from twelve units to thirteen and you pay the same $333. Go from twenty to twenty-one and the fee moves to $1,163. Here is every edge in the 2027 table.

The 20-to-21 edge is the one that bites hardest in practice, because that is where a great many growing fleets sit. Twenty power units is $333; twenty-one is $1,163; the twenty-first truck costs $830 in registration alone. That is not a reason to misreport a count — it is a reason to be certain the count is right, because a phantom unit left on a stale MCS-150, or a trailer counted as a truck, or an intrastate-only vehicle never excluded, each cost exactly the same $830 as a real truck would.

When the autofill is wrong

Option A is only as good as the MCS-150 behind it. A carrier who filed an MCS-150 three years ago with fourteen trucks, and has since run down to nine, will be shown fourteen — and fourteen and nine are in the same bracket, so nothing happens. The same carrier run down to five would be shown fourteen, and would pay $333 instead of $167 for the year. The autofill does not know, and the portal will not ask twice.

The clean answer is to update the MCS-150 so the federal record matches the fleet, then register against it. That is the filing that is supposed to change when equipment changes, it fixes the problem everywhere rather than once, and it means next October's autofill is right too. Option B is the other route, for the case where the record is behind and you are entering what you genuinely operated in the measurement window. What is not a route is typing a number you cannot support — the count is part of a registration you are certifying.

The dashboard two screens earlier shows the MCS-150 "Last Updated" date precisely so you can make this judgement before the vehicle screen appears. It is worth reading when it goes past. See where it sits in the nine screens.

UCR vehicle count — common questions