How to read an auction catalogue (the practical tutorial)

An auction catalogue looks intimidating because it is dense, formally worded, and full of conventions that nobody explains. Once you know the conventions, the catalogue is one of the most useful documents in the art market — it tells you almost everything you need to make a confident bidding decision, if you know where to look. This is the practical tutorial. We will work through a catalogue entry the way a serious buyer reads one, in order, with the specific things to notice at each step. Pictures, attribution language, condition reports, provenance, estimate, buyer's premium math, and the questions to ask before bidding. Everything you actually need before raising a paddle on a real piece. By the end you will be able to read a Sotheby's or Christie's catalogue entry and immediately know what is being claimed, what is being avoided, and what to ask the specialist before committing to a bid. ## Step 1 — Open with the photograph, not the words The catalogue photograph is the single most important piece of information in the entry. It is also the easiest to misread. Catalogue photographs at major houses are professionally lit, colour-balanced, and processed to standards that make the work look its best. This is not deceptive — it is industry-standard. But it means the photograph will not show the work as it appears in person. Three things to do before reading any text: **Zoom in to maximum resolution.** Most catalogue platforms allow extremely high zoom. Look for visible cracks, repaint, stains, edge damage, frame damage. The catalogue text may describe condition diplomatically. The photograph (zoomed) shows you the truth. **Look at the verso photograph if provided.** Major houses now include reverse photographs for serious pieces. The back of the work often tells you more than the front — gallery labels, customs stamps, exhibition tags, previous owner marks, frame history. Provenance evidence lives here. **Compare to other works by the same artist** at the same price range, on the same platform. The photograph that stands out — too saturated, too clean, too perfect — sometimes does so because the work has been over-restored. The photograph that looks "honest" — slight unevenness, visible age, normal patina — often indicates a more genuine surviving work. If a photograph cannot be enlarged, that itself is information. Catalogue listings without zoom capability are sometimes hiding condition issues. Request additional photographs from the specialist before bidding. ## Step 2 — Decode the attribution line The most important sentence in any auction catalogue entry is the one that says who made the work. This sentence is written in a precise, legally-meaningful vocabulary that the major houses have used consistently for decades. Each variation means something specific. The standard hierarchy, from strongest to weakest claim: **"[Artist Name]" (e.g. "Pablo Picasso")** A definitive attribution. The house is stating that this work is by Picasso. This is the strongest commercial claim the auction house can make and carries the strongest implicit warranty. **"[Artist Name] (signed)"** The work is signed by the artist and the house attributes it to them definitively. **"Attributed to [Artist Name]"** The house believes the work is probably by the artist named, but cannot definitively confirm it. Significant price discount compared to a definitive attribution. **"Studio of [Artist Name]" or "Workshop of [Artist Name]"** The work was produced in the artist's studio, possibly with their oversight, but not by their own hand. This was common practice for major Renaissance and Baroque artists who ran large workshops. **"Circle of [Artist Name]"** Made by an unknown artist in close contact with the named artist — geographic and temporal proximity, similar style, but no studio connection established. **"Follower of [Artist Name]"** A later artist, often working decades after the named artist, in a derivative style. **"School of [Artist Name]" or "Manner of [Artist Name]"** Even further removed. Stylistically related but no direct connection. **"After [Artist Name]"** A copy or interpretation of a known work by the named artist, made by someone else, often much later. The price difference between "Pablo Picasso" and "After Pablo Picasso" can be 1000x or more for the same subject matter. This is not a small detail. It is the entire commercial proposition of the lot. ## Step 3 — Read the lot description, slowly After the attribution line, the catalogue gives a structured description of the work. The format is consistent across major houses: Title (sometimes in italics or quotes) Dated [year], or "circa [year]" Medium, on support (e.g. "oil on canvas") Dimensions, height × width × depth (in cm and inches) Signed and/or dated, with location of signature Edition information (if applicable) Things to notice here: **"Circa [year]"** indicates the dating is not precise. For most artists this is fine. For artists whose work is dated by stylistic period, "circa" can hide important context — early-period vs late-period work has different value. **Medium specificity.** "Oil on canvas" is clear. "Mixed media on paper" is vague and may hide materials that affect both value and conservation prospects. Ask the specialist what is in the "mixed" portion. **Dimensions matter for value.** Within an artist's body of work, scale is often a primary value driver. A 30×40 cm Hockney pool painting and a 200×300 cm Hockney pool painting are not on the same commercial register, even if the subject is identical. **Signature location.** "Signed lower right" is normal. "Signed verso" (on the back) is slightly less ideal but common. "Inscribed" but not signed is weaker. "Unsigned" is a significant flag — confirm the attribution with the specialist. **Edition numbers.** For prints, photographs, and sculptures, "edition of [n]" tells you the total run. Lower edition numbers (4/50 is more desirable than 47/50 to many buyers, though some experts say this is psychological rather than rational). "Artist's Proof" (AP) prints exist outside the main edition. ## Step 4 — The provenance section Below the description, serious lots include a provenance section. We covered provenance in detail in our previous article ("Buying art with provenance: what documents actually matter"), but specific to catalogue reading, here is what to look for: **Named previous owners with dates.** The strongest provenance. "Galerie Maeght, Paris, 1971" tells you exactly where the work was at a specific moment. **"Private collection, Europe"** — generic. Acceptable if accompanied by other documented details, weak as a sole entry. **"By descent in the family"** — common for older works. Means the work has stayed with descendants of the original owner. Reasonable but not as strong as a documented sale. **"Acquired from the above"** — links between entries. The chain matters. Unbroken chains are stronger than chains with gaps. **The 1933-1945 window.** Reputable houses now affirmatively address this period for European works of relevant age. A catalogue entry that simply skips over this window for a 1920s German painting, for example, is a flag, not an oversight. If provenance is short or vague for a piece estimated at five figures or more, ask the specialist to send the full provenance research file. They will have one. Whether they share it readily is informative. ## Step 5 — Exhibition and literature After provenance, serious catalogue entries list: **Exhibitions** — public shows the work has appeared in, with dates, venues, and catalogue numbers if applicable. **Literature** — publications in which the work is illustrated or discussed. Most importantly: the catalogue raisonné entry (a complete scholarly listing of an artist's works) if one exists. A catalogue raisonné citation is one of the strongest authentication signals available. If the work appears in the artist's catalogue raisonné as a known piece, the question of authenticity is largely settled. Absence from a catalogue raisonné when one exists is not automatically a flag (the catalogue may pre-date the work, the work may have been unknown to the scholars), but it is a question to ask. For artists without a catalogue raisonné, prior exhibition history at recognised institutions serves a similar function. ## Step 6 — The condition report The condition report is the most useful document in the entry and the one most amateur buyers ignore. Auction houses do not print full condition information in the catalogue text. They produce a separate condition report on request, written by a specialist who has examined the work. This is free, normally available within 24 hours of request, and contains specific technical information about the physical state of the piece. What to look for in a condition report: - **Inpainting / restoration** — areas where the work has been retouched or restored. Small inpainting is normal on older works. Extensive inpainting affects value. - **Lining** — for canvas paintings, "lined" means the original canvas has been backed with a second canvas for support. This is a routine conservation treatment but indicates the work has needed intervention. - **Craquelure** — the network of fine cracks in old paintings. Stable craquelure is normal. "Unstable craquelure" or "flaking" is a serious concern. - **Tear, loss, abrasion** — specific physical damage. Locations matter (damage in the focal area is much worse than damage at the edges). - **UV examination notes** — under ultraviolet light, restoration glows differently from original paint. The condition report should note what UV examination revealed. A condition report that says "the work is in good condition consistent with its age" is not telling you much. A condition report that lists specific issues is more useful, not less — it tells you the specialist actually examined the work carefully. Always request the condition report before placing a serious bid. Never bid on a high-value lot without one. ## Step 7 — The estimate The estimate appears as a low–high range: "$40,000 - $60,000". This is the auction house's working assessment of what the work should sell for. The reserve (the minimum the seller will accept) is typically at or below the low estimate and is confidential. Reading the estimate: **Narrow ranges** (e.g. €100,000 - €120,000) indicate the house has high confidence in the value. Often used for works with clear comparable sales history. **Wide ranges** (e.g. €40,000 - €80,000) indicate uncertainty. Either the work is unusual, the artist's market is volatile, or the house deliberately set a wide range to encourage bidding. **"Estimate on request"** for top lots means the house is signalling that the work will sell for significantly more than the public estimate would suggest. Common for major evening sale pieces. **Bids in the bottom third of the estimate range** often win lots that don't generate competition. Bids in the top third often need to push beyond the high estimate to secure the lot if there is real demand. A piece that sells at the low estimate is a market signal — the house's specialists priced it accurately and demand was modest. A piece that sells at multiples of the high estimate signals either competition that exceeds market expectation, or a house that deliberately underestimated to create drama. ## Step 8 — The buyer's premium math (and why it matters more than you think) This is the section that costs most new buyers more than they expected. The hammer price (the final winning bid) is not what you pay. The buyer's premium is a percentage added on top, retained by the auction house, on every winning bid. As of February 2026, the rates at the two main houses are: **Sotheby's** (tiered, per lot): - 28% on the portion of the hammer price up to $2 million / £1.5 million - 22% on the portion between $2m and $8m / £1.5m and £6m - 15% on the portion above **Christie's** (tiered, per lot): - 27% on the portion of the hammer price up to $1.5 million / £1 million - 22% on the portion between $1.5m and $8m / £1m and £6m - 15% on the portion above Worked example. You bid $100,000 hammer on a Sotheby's lot in New York. Hammer price: $100,000 Buyer's premium: 28% × $100,000 = $28,000 Total: $128,000 Plus any applicable taxes (VAT or sales tax depending on jurisdiction) This is before shipping, insurance, and any export duties. The total cost of a $100,000 hammer bid can comfortably exceed $135,000 by the time the work is sitting in your home. **Practical implication.** When you decide your maximum bid, work backwards from your total budget. If your total budget is €100,000 including everything, your maximum hammer bid is approximately €76,000 to €78,000 (depending on the house's premium tier and applicable taxes). The classic new-buyer error is bidding to your budget number on the hammer, then being shocked by the final invoice. Don't make that error. ## Step 9 — Phillips, regional houses, and online platforms The two giants set the framework but they are not the only options. **Phillips** (the third-largest international house) has a similar buyer's premium structure, with a recent twist: they introduced a "Priority Bidding" discount of a few percentage points for buyers who place binding bids 48+ hours in advance of an auction. If you know you want a lot and have the budget, this can save real money. **Regional houses** (Bukowskis in the Nordics, Dorotheum in Vienna, Bonhams worldwide) often have lower buyer's premiums — 20-25% is typical. For mid-market pieces, regional houses are frequently the better commercial proposition. **Online platforms** (Artsy, Artnet auctions, LiveAuctioneers, Invaluable) aggregate hundreds of smaller auction houses with widely varying terms. Read the specific house's conditions before bidding. Premium rates of 25-30% are common, and condition reports may be less thorough. For new collectors building experience: start at a regional house with lower premiums and friendlier specialists. Move to the big houses when you are buying pieces where the global market matters. ## Step 10 — The questions to ask before bidding If you are seriously considering bidding on a lot above €5,000, the following should happen before you place the bid. The specialist will help you with all of them. 1. Request the full condition report. Read it. Ask follow-up questions if anything is unclear. 2. Confirm the provenance research file is complete and ask about any gaps, particularly the 1933-1945 window if relevant. 3. Confirm authentication evidence: catalogue raisonné citation, signed authentication, foundation endorsement. 4. Ask whether the seller has any reserve information you should know. 5. Ask about export restrictions or local cultural-heritage laws that might affect taking the piece across borders. 6. Confirm your buyer's premium calculation and total expected invoice including taxes. 7. Confirm shipping options and approximate cost. The specialist's responses to these questions are themselves diagnostic. A house that answers clearly and quickly is a house worth bidding through. A house that deflects, delays, or treats the questions as friction is a house to be more careful with. ## The summary Auction catalogues are dense but legible. The information is all there, in conventional form, if you know what each section is for: the photograph for honest visual inspection, the attribution line for what the house is actually claiming, the description for technical specifics, the provenance for ownership history, the literature for authentication weight, the condition report for physical state, the estimate for the house's view, the buyer's premium for the math of what you will actually pay. Read the catalogue carefully. Request the condition report. Calculate the total cost before you bid. Ask the specialist questions. Bid your real maximum, not your fantasy maximum. Done in that order, the auction room is not intimidating. It is one of the most transparent places to buy serious art, because all the information is on the page if you know how to read it. ## Sources The Value, "Sotheby's adjusts 2026 buyer's premium" — February 2026 rate changes covered in detail. The Art Newspaper, "Sotheby's hikes buyer's premiums as auction houses test new fee structures" — 2026 rate update plus Christie's September 2025 update. Sotheby's Help Center, "What is a buyer's premium?" — Official 2026 rate schedule by location. Wikipedia, "Buyer's premium" — full historical evolution of the modern buyer's premium since its 1975 introduction. MyArtBroker, "A Guide To Auction v Private Sale in the Art Market" — current 2026 commission structures across major houses including Phillips.