How it is computed
For each product on the menu, count the deals it was sold on. Divide by deals delivered. Express it as a whole percent. Beside it, carry the gross held per product: the average gross on the deals where it was sold.
Why it matters
It is the coachable unit of the F&I office. Nobody can act on a product index of one point nine; everybody can act on a maintenance plan attached to one deal in ten.
It separates the two ways F&I gross is built. A product with high penetration and low gross held is being given away to make the attach; a product with low penetration and high gross held is being sold rarely but well.
How operators read it
- Read it by manager and by product in one grid. The office's weakness is almost always one person on one product, and the grid names both.
- Read it against the menu presentation. A product that is rarely attached is often rarely presented; the fix may be in the process before it is in the pitch.
- Hold the denominator steady across managers. Cash deals in or out, decided once for the store, or the comparison is meaningless.
Questions people ask
What is a good penetration rate?
It depends on the product, the lender mix, and the kind of store, so compare a manager to the manager at the next desk and to their own last quarter. The spread inside the office is where the coaching is.
How does penetration relate to PVR?
Penetration times gross held, summed across products, is product gross per deal, which is PVR without the reserve. Raise penetration on products that hold their gross and PVR rises in a way that lasts.
How A.D.A.M. reads it
A.D.A.M. computes per-product penetration as a whole percent and per-product gross held, by manager and for the store, and names the product and the manager where the gap is. He reads it beside the numbers it trades against, names what the gap is worth, and leaves the decision where it belongs. What an AI advisor should do, and refuse to do.