If you’ve been putting off a trade-in, this week’s timing matters more than the holiday sale banners.
**Here’s the real hook:** On September 3, 2026, Black Book published its August Used Vehicle Retention Index. The seasonally adjusted number slipped **1.2%** (about 1.7 points) to **144.3**, down from 146.0 in July. That’s the **third consecutive month** of decline, and the index sits about **1.5% below** where it was in August 2025.
Laura Wehunt at Black Book put it in plain English: we’re not staring at a crash, but depreciation is expected to keep rolling through the rest of the year — especially if manufacturers lean harder into fourth-quarter incentives. Used values are still roughly **30% higher than 2019**, so nobody’s “giving cars away.” They’re just not holding every dollar they held in early summer.
Dealers don’t price your trade off a feeling. Wholesale auction comps, segment demand, mileage, condition, and options all move the number. When retention softens three months in a row, the practical takeaway for owners is simple:
We’re not inventing doom. We’re saying: **know today’s number** before you walk into a Labor Day negotiation.
1. **Get a current estimate** using your year, make, model, mileage, and honest condition — not last month’s memory of a KBB screenshot.
2. **Separate the trade from the purchase.** Negotiate the new payment and the trade dollars as two conversations so a shiny payment quote doesn’t hide a soft trade.
3. **Mind the clock into Q4.** If Black Book’s outlook holds and OEM incentives rise later this year, used values often feel more pressure — not less.
If you’re shopping a truck, SUV, or family car in Texas this Labor Day week, a fresh appraisal takes minutes and keeps you from guessing.
**Soft CTA:** Ready for a no-pressure trade-in estimate? Submit your vehicle details on the form at [priceformytrade.com](https://priceformytrade.com) and we’ll help you see where you stand before you commit.
**Takeaway:** Black Book’s August index confirmed another soft month for used retention. Before you trade this week, get an updated number — not last season’s guess.