Year
2021
Engine
Cummins ISX / X15
Horsepower
400 HP
Transmission
Automated Manual
Axle Config
6x4
Fuel
Diesel
2021 Kenworth T680 UMJ431987A
Wisconsin Kenworth
Madison, WI
VIN
1XKYD49X9MJ431987
NHTSA VerifiedStock #
csm-UMJ431987A
Dealer
Wisconsin Kenworth
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2021 Kenworth T680 UMJ431987A
2021 Kenworth T680
Est. monthly
$1,010.40
Pre-tax purchase price
$5,290
Owner-ops: 10–20% typical
Prime 7–9% · Median 9–12% · Subprime 14%+
Deducted from financed amount
Drives Federal Excise Tax (FET)
Skip if straight truck under 33k GVWR or trailer under 26k GVWR.
Off — used vehicles are exempt
$0
Often 0% for interstate commercial use
Some states cap (CA $85, NY $75)
State title + lien fee
Lowers monthly; paid as lump at term
Amount financed
$48,110
Total interest
$12,514
Total cost
$65,914
Effective / month
$1,010.40
Estimate only. Actual financing depends on credit, dealer program, and lender terms. Heavy-truck APRs typically range 7–18% depending on credit tier, vehicle age, and LTV. Interstate commercial-use purchases are often exempt from state sales tax. TruckRadar is not a lender. Consult a commercial-vehicle lender for binding quotes.
Market Index
2021 Kenworth T680 ISX / X15
Median Price
$46,900
This listing
13% above market median
Active listings
32