Before and After the Hammer
Reading a Catalogue: How to Research an Artist Before Buying at Auction
A sale catalogue is written by the party selling the work, which makes it a technical record and a marketing document at once. Knowing how to research an artist before buying at auction means testing that document line by line, before the first lot opens.
A sale catalogue is written by the party selling the work, which makes it a technical record and a marketing document at once. Knowing how to research an artist before buying at auction means testing that document line by line: comparing each estimate against the quality of the specific lot, reading the condition and provenance notes for the information they leave out, and arriving with a written ceiling for every lot on the shortlist. What follows is the sequence a prepared collector runs between a catalogue going online and the first lot closing.
Key takeaways:
- Global art sales rose 4% to $59.6 billion in 2025, with public auction sales up 9% to $20.7 billion, on the Art Basel and UBS Global Art Market Report 2026 by Arts Economics.
- An estimate is the house's own opinion of a likely hammer range. It carries no guarantee and no independent valuation, and it anchors every bid that follows it.
- Guaranteed lots made up 72.9% of evening sale volume in the first five months of 2025, the highest share ArtTactic has recorded since it began measuring in 2016.
- Cataloguing language is graded: “signed” records the cataloguer's opinion that the artist wrote it, while “bears signature” records that another hand did.
- A ceiling is a hammer number, so the fees come out first. At LLB Auction's disclosed 20% buyer's premium, a 30,000 EUR budget is a 25,000 EUR hammer ceiling.
What a Lot Entry Contains, and What It Leaves Out
Every work offered in a sale is a lot, and its lot number is the position it holds in the running order, used for every bid, invoice and published result afterwards. A complete entry carries the artist's name and dates, the title and year, the medium, the dimensions, the wording of any signature or inscription, the provenance (the recorded chain of ownership), the literature and exhibition lines, the estimate, and any lot symbols.
Three commercially decisive facts sit outside the entry. The reserve is the confidential minimum below which the consignor is not obliged to sell, conventionally set at or below the low estimate; Artsy's guide to catalogue symbols defines it as the minimum bidding price at which a lot can be sold. The condition report is a separate document supplied on request, so a page-only reader holds less than the underbidder. The buyer's premium, the percentage added to the hammer price to produce the invoice, sits in the conditions of sale at the back.
The lot symbols printed beside the estimate carry the commercial disclosures: house ownership of the lot, a guarantee given to the consignor, or a third party holding an irrevocable bid placed before the sale opens.
How to Research an Artist Before Buying at Auction: The Seven Checks That Come First
Catalogue research answers one question: does this work sit at the strong end or the weak end of what the artist produced? Seven sources answer it, and the catalogue supplies only the first. A collector who compresses how to research an artist before buying at auction into a single database search is pricing a name, and the name is the least informative thing on the page.
- The lot entry's own facts. Read the medium line and the dimensions before the image. A unique canvas, a signed edition of 50 and an unsigned exhibition poster by the same artist trade in three separate markets.
- The catalogue raisonné. A catalogue raisonné is the scholarly inventory of an artist's known works, compiled by an estate, a foundation or an academic committee. Confirm the work appears, and record the reference number the entry cites.
- The artist's estate or foundation. Estates hold the authentication protocol and the archive photography, and their published position on what they will examine outranks any assurance offered in a sale room.
- Auction result databases. Artprice and Artnet index past results by artist, medium, dimensions and year. Assemble at least eight comparable results from the past thirty-six months in the same medium and a similar scale.
- Exhibition and literature records. Verify that any exhibition named in the entry appears in the institution's own published catalogue, under the same title and dates.
- Independent market reports. The Art Basel and UBS Global Art Market Report by Arts Economics, the TEFAF Art Market Reports, the Artprice Contemporary Art Market Report and ArtTactic's auction analyses each cover a different slice: aggregate value, structural research, contemporary volume and evening-sale mechanics.
- The primary-market position. Identify which galleries represent the artist and the price level at which new work is placed. A secondary estimate far above the primary price list is a question to answer before bidding.
Scanning Estimates Against Quality
An estimate is the auction house's pre-sale opinion of the range in which a lot is likely to hammer, published to attract bidders and agreed with the consignor. No house underwrites it. The consequence is anchoring: once a number is printed, every bid is judged against it, which is why how to research an artist before buying at auction starts from an independently built comparable set.
Global art sales reached $59.6 billion in 2025, a rise of 4%, and public auction sales climbed 9% to $20.7 billion, according to the Art Basel and UBS Global Art Market Report 2026 by Arts Economics. Sales below $50,000 fell 2% in both value and volume, so the band where most contemporary lots sit is thinner than the headline suggests. Dr. Clare McAndrew, founder of Arts Economics, summarised the year: “The market welcomed a shift in direction in 2025, from the contraction of previous years to modest growth.”
| What the catalogue shows | What it usually signals | What to verify before bidding |
|---|---|---|
| Estimate below the artist's recent comparables | The house is inviting competition, or the work is weak for the artist | Match medium, size, date and condition against eight or more results from the past three years |
| Estimate above recent comparables | A high reserve, a guarantee, or a genuinely exceptional work | Read the lot symbols, then test whether any comparable supports the top of the range |
| Estimate on request | Withheld, normally on a high-value lot | Request the figure in writing before the viewing closes |
| Wide band, high at twice the low or more | Thin comparables, contested attribution, or uncertain condition | Read the condition report and the provenance line before accepting either end |
How to Research an Artist Before Buying at Auction: Condition and Provenance Flags
Reading the condition report
A condition report is the house's written description of the physical state of the work, and requesting one is the highest-yield act in the fortnight before a sale. MyArtBroker's guide to condition reports, updated in August 2025, sets out what a full report contains: identification details, the framing or mounting structure, a detailed condition description, photographs of front and back, conservation history and preservation recommendations. The vocabulary is technical and precise. Foxing is the corrosion of paper by mould spores or rusting iron. Cockling describes parallel waves in un-creased paper. Craquelure is the accumulation of fine cracks that follows repeated changes in climate. Each of the three carries a conservation cost and a resale discount, and none of them shows in a catalogue photograph lit to flatter. Read the report against the image, then ask what the report does not mention.
Reading the provenance line
Provenance is the documented chain of ownership from the artist to the current consignor, and it is graded by specificity. This is the point at which how to research an artist before buying at auction turns forensic. “Acquired directly from the artist by the present owner” is a claim that can be tested. “Private collection, Europe” names nobody and dates nothing. Treat an unexplained gap of two or more decades as an open question, and apply the same caution to a chain that reads as seamless, since real ownership histories are rarely tidy.
Attribution wording is graded in the same way, and the major houses publish that grading in their explanation of cataloguing practice. “Signed”, “dated” and “inscribed” record the cataloguer's opinion that the artist made those marks. “Bears signature”, “bears date” and “bears inscription” record that another hand did. “Attributed to” is a qualified opinion that the work is probably by the artist, in whole or in part. The step from “signed” to “bears signature” changes what the house is prepared to stand behind. The same grading logic runs through reading the art market without mistaking price for value.
Spotting the Underestimated Lot
An underestimated lot is one whose quality the entry describes accurately and frames modestly. Four patterns produce it repeatedly. Position: lots placed after the marquee consignment in a single-owner dispersal receive less viewing attention. Format: works on paper by artists known for painting are catalogued in a lower band even when the sheet is fully resolved. Date: a strong year currently out of fashion carries a discount unrelated to the object. Absence of symbols: a lot with no guarantee and no house interest has no institutional floor beneath it, which lowers the estimate and thins the field.
Artprice's Contemporary Art Market Report 2025, published on 7 October 2025, recorded a “new record number of transactions” in a year when contemporary global sales, in its own words, “clearly contracted again, losing a quarter of the previous year's turnover”, with growth concentrated in works under $5,000. More lots competing for less money means more entries priced quickly. That is where how to research an artist before buying at auction earns its return: on the lots nobody else had time to check.
Identifying the Over-Hyped Lot
Over-hyping is structural rather than dishonest. A house allocates its catalogue essay, its cover position and its private-view attention to the lots carrying its financial exposure. A guarantee is an undertaking that the consignor receives a minimum price whether or not the lot sells; when a third party assumes that exposure in exchange for the right to bid, it becomes an irrevocable bid. Guaranteed lots made up 72.9% of evening sale volume in the first five months of 2025, across more than 2,350 lots totalling $10.01 billion, the highest share since the analysis began in 2016, according to ArtTactic's Auction Guarantee Analysis of July 2025. The same study found the top 25 artists accounted for 72% of total guaranteed value.
Three further signals deserve weight. A “fresh to market” claim the databases contradict. An artist whose entire auction record spans two years, where no comparable set is possible. And a segment moving against you: public auction values fell 25% in 2024 while the market as a whole declined 12% to $57.5 billion, on the Arts Economics figures for that year, so promotional effort concentrates on fewer lots whenever the auction channel contracts. What that pressure does to published results is examined in what a record price actually tells you.
Building a Shortlist With a Ceiling for Each Lot
A shortlist is a written document with four columns: the lot number, the comparable range you built, your hammer ceiling, and the one condition or provenance fact that would make you walk away. Six to ten lots is a workable size for a sale of two hundred.
The ceiling is a hammer figure, so the fees come out first. Buyer's premium is the percentage the house adds to the hammer price. LLB Auction discloses a flat 20% with no additional costs, so a total budget of 30,000 EUR supports a hammer ceiling of 25,000 EUR; deduct 900 EUR for shipping and insurance and the ceiling is 24,100 EUR, rounded down to 24,000 EUR at the nearest increment. The arithmetic moves sharply with the rate. Sotheby's raised its lowest-tier buyer's premium from 27% to 28% with effect from 13 February 2026, applying to hammer prices up to 1.5 million GBP in London and $2 million in New York, as reported by The Art Newspaper. At 28%, the same 30,000 EUR supports a hammer ceiling of 23,437 EUR before shipping. VAT, where it applies, is charged on the premium.
Registration closes the preparation. Houses require identity documents and, for higher-value lots, a bank reference or a deposit, processed in advance rather than during the sale. The sequence for how to research an artist before buying at auction ends here, with a number written down before the first lot opens. Both sides of that sale are set out in Before and After the Hammer: Reading a Sale on Both Sides, and the two markets a collector straddles in primary or secondary: the two markets every collector straddles.
FAQ: Researching Lots Before an Auction
How to research an artist before buying at auction when no catalogue raisonné exists?
Start with the estate or foundation archive, then build a comparable set of at least eight auction results from the past thirty-six months on Artprice or Artnet, filtered by medium and scale. Add the gallery that represents the artist and its current primary price level. For living artists with no raisonné, the studio inventory number recorded on the reverse or in the condition report is the strongest single identifier available.
What is a lot number in an auction catalogue?
A lot number is the sequential identifier assigned to each item in a sale, printed at the head of the catalogue entry. It fixes the position of the work in the running order and serves as the reference for absentee bids, invoices and published results. Lots are numbered in the order they will be offered, so the number also indicates roughly when a work closes.
How do you set a bidding limit at an auction?
Work backwards from the total you are prepared to pay. Subtract the buyer's premium, then shipping, insurance and any applicable VAT, and round the remainder down to the nearest bidding increment. That figure is your hammer ceiling. Write it beside the lot number before the sale opens, because a limit decided during competitive bidding is a preference wearing the name of a limit.
How do you register to bid at an auction?
Registration requires proof of identity and address, and for higher estimates a bank reference or a refundable deposit. Online timed sales collect the same documents through the platform. Houses process registrations in advance and approval is not automatic on the day, so complete it while the catalogue is open for viewing rather than in the closing hour.
Does a guarantee symbol mean a lot is worth more?
A guarantee records that the consignor is assured a minimum price, by the house or by a third party. It signals commercial commitment rather than quality, and the guarantor may be bidding on financing terms no other bidder receives. Read the symbol as information about who else is in the room and why.
How LLB Auction Serves the Collector Working a Catalogue
LLB Auction is a contemporary art auction house running its own online platform, and its editorial position is buyer-side. The house's answer to how to research an artist before buying at auction is to complete part of the work before the catalogue is published.
Curated intake. Roughly 40% of submissions are declined at intake. Per-lot due diligence covers certificate verification, ownership history and conservation records, and the artists handled include Andy Warhol, Damien Hirst, Yayoi Kusama, Takashi Murakami, Keith Haring, Julian Opie, Ed Ruscha and Banksy.
Documented condition. Every lot carries a three-page professional condition report, published alongside the entry, so the physical facts reach every bidder at the same moment.
Disclosed cost. The buyer's premium is 20% and the seller's commission 10%, both stated upfront, with no additional charges at checkout. Sales run as timed online auctions of 7 to 14 days with no live bidding. The Contemporary Art Spring 2026 sale, closing on 26 May 2026, offered 25 lots and sold 23 for roughly 39,480 EUR in gross hammer.
The catalogues for the current LLB Auction sales carry the condition reports and the ownership records alongside every lot.
Conclusion
A catalogue rewards the reader who arrives with the questions already formed. The lot entry supplies the facts the house is prepared to state, the condition report supplies the facts it will state on request, and the databases, the raisonné and the estate supply what neither document contains.
The method is unglamorous and repeatable. Seven checks establish where a work sits in an artist's output, one comparable set establishes what the market has paid for similar works over three years, and one line of arithmetic converts a budget into a hammer ceiling. That is what how to research an artist before buying at auction amounts to in practice, and it is what separates a collector who enters a sale prepared from one who enters it reactive.
Also worth reading:
- Before and After the Hammer: Reading a Sale on Both Sides
- Reading the art market without mistaking price for value
- What a record price actually tells you
- Primary or secondary: the two markets every collector straddles
- From first valuation to final hammer: how to sell art through a house
Sources:
- The Art Basel and UBS Global Art Market Report 2026 : Art Basel and UBS, by Arts Economics, 2026
- The Art Market 2025: The Global Market : Art Basel and UBS, by Arts Economics, 2025
- The Contemporary Art Market Report 2025 : Artprice by Artmarket.com, 2025
- Auction Guarantee Analysis, July 2025 : ArtTactic, 2025
- Art Market Reports : TEFAF, 2025
- Sotheby's raises buyer's premium to 28% at the lower tier : Antiques Trade Gazette, 2026
- Sotheby's hikes buyer's premiums : The Art Newspaper, 2026
- A Guide to Condition Reports for Art Collectors : MyArtBroker, 2025
- Auction Catalogue Symbols, Decoded : Artsy, 2022
