A hand-knotted rug's value is determined by five measurable pillars. Each one can be objectively assessed and quantified. This guide explains what appraisers look at — and how the RUG Index formula turns those assessments into a defensible, reproducible value.
A single rug has four different "correct" values depending on what the value is being used for. Confusing these is the most common mistake — and the reason many rugs are severely under-insured.
What the rug would sell for on the open market between a willing buyer and seller. This is the baseline value in the RUG Index formula — the number all other values derive from.
What it would cost to find and purchase a comparable rug at retail. This is significantly higher than resale because you're paying retail prices, dealer markups, and search costs. Insurance policies should be written at this value. Most rugs are severely under-insured because owners use resale value for coverage.
The price to purchase a comparable rug from a reputable dealer. Similar to insurance replacement but without the urgency premium.
What the rug would likely sell for at auction. Auction values are lower than resale because buyers at auction include dealers who need room for markup. Major auction houses (Christie's, Sotheby's, Skinner) achieve better results than local auctions.
The free RUG Index valuation tool gives you a solid estimate based on the five-pillar formula. For many purposes — deciding whether to sell, getting a general sense of value, or understanding what insurance coverage you need — a free estimate is sufficient.
A certified RICA appraisal report is required when the value has legal or financial consequences: insurance claims, estate settlement, IRS charitable deductions, divorce proceedings, or when selling through a dealer or auction house that requires documented provenance. The report is signed by a RICA-certified appraiser, includes USPAP compliance statements, and is defensible in court or before the IRS.
To illustrate how the formula works in practice, consider a 9×12 foot Persian Tabriz rug in very good condition, approximately 60 years old, with a wool pile and a knot count of around 180 KPSI.
The base rate is $12 per square foot. For a 9×12 rug (108 sq ft), the base area value is $1,296. This is a conservative starting point before any quality multipliers are applied.
Tabriz is one of the major Persian weaving cities and commands an origin multiplier of 1.8×. This brings the base value to $1,296 × 1.8 = $2,333.
Standard wool pile: 1.0×. If this were silk pile, the multiplier would be 1.8–2.2×. Our wool Tabriz stays at $2,333.
At 60 years old, this rug is in the vintage category (50–99 years): 1.35×. Value rises to $2,333 × 1.35 = $3,150.
Very good condition with minor wear corresponds to Grade B: 0.85×. Value becomes $3,150 × 0.85 = $2,677.
At 180 KPSI, this is in the standard range (100–200): 1.0×. Resale midpoint = $2,677.
From the resale midpoint of ~$2,700, the formula generates all four standard values: insurance replacement (~$5,940–$7,020), retail replacement (~$5,400–$5,940), resale market value (~$2,700), and auction estimate (~$1,755–$2,295). The insurance replacement value — nearly 3× the resale value — is what you need to insure properly.