It depends on the definition of "upper middle class." I think Princeton is very generous on incomes up to $250,000.
And all Princeton aid is in the form of grants, not loans. From Princeton's website:
| Gross Family Income | Percent Qualified | Average Grant | What It Covers |
|---|---|---|---|
| $0–65,000 | 100% | $67,350 | Full tuition, college fee, room + board |
| $65,000–85,000 | 100% | $62,865 | Full tuition, college fee, 76% room + board |
| $85,000–100,000 | 100% | $59,140 | Full tuition, college fee, 54% room + board |
| $100,000–120,000 | 100% | $55,540 | Full tuition, college fee, 32% room + board |
| $120,000–140,000 | 100% | $53,180 | Full tuition, college fee, 17% room + board |
$140,000–160,000 | 100% | $50,000 | Full tuition |
$160,000–180,000 | 100% | $43,900 | 89% tuition |
$180,000–200,000 | 91% | $38,810 | 78% tuition |
$200,000–250,000 | 83% | $29,900 | 60% tuition |
$250,000 and above | 33% | $22,880 | 46% tuition |