Tennessee Reduce-By Rule vs. Georgia Add-On Rule: Why It Matters
If you live near the Tennessee-Georgia state line - and if you're in Chattanooga, you live minutes from it - the difference between these two states' UM/UIM rules can mean tens of thousands of dollars in your pocket. This is especially critical for accidents on the I-75 corridor, I-24 near the state line, or US-27 heading into North Georgia.
Side-by-Side Comparison: The Same Accident in Two States
Assume you have $50,000 in total damages, $25,000 in UM/UIM coverage, and the at-fault driver has $25,000 in liability coverage:
| Factor | Tennessee (Reduce-By/Offset) | Georgia (Add-On) |
|---|
| Your Total Damages | $50,000 | $50,000 |
| At-Fault Driver's Payment | $25,000 | $25,000 |
| Your UM/UIM Coverage | $25,000 | $25,000 |
| How UM/UIM Applies | $25,000 UM minus $25,000 offset = $0 from UM | $25,000 UM added on top = $25,000 from UM |
| Total Recovery | $25,000 | $50,000 |
| Uncompensated Damages | $25,000 out of pocket | Fully compensated |
This is important to understand. In Tennessee, if your UM coverage equals the at-fault driver's liability coverage, your UM pays you nothing. The at-fault driver's $25,000 completely offsets your $25,000 UM coverage. You end up $25,000 short on a $50,000 claim. In Georgia, you'd collect the full $50,000.
This is why UM/UIM coverage amounts matter enormously in Tennessee. If you carry only $25,000 in UM/UIM (matching the state minimum liability requirement), your UIM coverage is essentially worthless against any driver who carries the minimum. You need UM/UIM limits significantly higher than the minimum liability limits to get meaningful protection under Tennessee's reduce-by rule.
Which state's law applies? Generally, the law of the state where the accident occurred controls. If you're a Tennessee resident hit in Georgia, Georgia's add-on rule may apply, giving you substantially more recovery. If the accident happens in Tennessee, you're stuck with the reduce-by rule. For accidents right on the state line - and there are plenty on I-75 near the Ringgold/East Ridge corridor - the exact location matters. We analyze which state's law provides the best recovery for our clients.