Year
2021
Engine
Cummins ISX / X15
Horsepower
400 HP
Transmission
Automated Manual
Axle Config
6x4
Fuel
Diesel
2021 Kenworth T680 UMJ434940A
Wisconsin Kenworth
Milwaukee, WI
VIN
1XKYD49X9MJ434940
NHTSA VerifiedStock #
csm-Truck
Dealer
Wisconsin Kenworth
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2021 Kenworth T680 UMJ434940A
2021 Kenworth T680
Est. monthly
$896.99
Pre-tax purchase price
$4,690
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
$42,710
Total interest
$11,109
Total cost
$58,509
Effective / month
$896.99
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
Near market median
Active listings
32
2020 Kenworth T680
$54,999
468,262 mi
Fontana
2022 Kenworth T680
$58,999
454,011 mi
Tolleson, AZ
Inland Kenworth
2022 Kenworth T680
$57,999
491,280 mi
El Cajon, CA
Inland Kenworth
2020 Kenworth T680
$54,999
421,213 mi
Fontana
2022 Kenworth T680
$58,999
457,586 mi
Tucson
2020 Kenworth T680
$34,900
519,300 mi
Eau Claire, WI
Allstate Peterbilt Group
2020 Kenworth T680
$54,999
468,262 mi
Fontana
2022 Kenworth T680
$58,999
454,011 mi
Tolleson, AZ
Inland Kenworth
2022 Kenworth T680
$57,999
491,280 mi
El Cajon, CA
Inland Kenworth
2020 Kenworth T680
$54,999
421,213 mi
Fontana
2022 Kenworth T680
$58,999
457,586 mi
Tucson
2020 Kenworth T680
$34,900
519,300 mi
Eau Claire, WI
Allstate Peterbilt Group