Three parts: a call-out fee for the mechanic to come to you (commonly in the $100–$300 range depending on distance and hour), an hourly labor rate (market rates for mobile heavy-duty work typically run $125–$250), and parts. Through RIG you see all three in each mechanic’s bid before anyone rolls — the only fixed number RIG itself charges is a $10 expedited-service deposit, applied to your final balance.
Roadside pricing has a reputation problem it earned in the one-shop-answers-the-phone era: when the only mechanic who called back knows he is the only option, the invoice reflects it. The structure itself is legitimate, though. The call-out fee covers a skilled tech driving a parts-loaded service truck to you, often at 2 AM; the hourly rate covers work done in the weather on the shoulder rather than in a bay; parts cost what parts cost, with roadside inventory carrying a premium over a parts counter.
What moves your number: distance from the mechanic’s base (the biggest factor — rural corridors mean longer rolls), time of day and day of week, the repair itself, and parts — a $40 belt versus a $700 tire versus a $1,200 alternator on some applications. Nights, weekends and holidays legitimately cost more; the mechanic answering at 3 AM Sunday is charging for the 3 AM part.
RIG’s answer to the pricing problem is not a promise of cheap — it is competition and visibility. Your breakdown goes to multiple mechanics at once, each bids with the call-out fee, rate and ETA written down, and you pick. The bid you accept is the deal, payment settles through RIG when the work is done, and the $10 deposit is the only number you commit to before choosing.