Stop guessing what you'll actually pay at auction. Build your bid list, see your total cost at every increment — in the auction currency and your home currency — before the hammer falls. Deep automation for the-saleroom.com, with EasyLive and more platforms being added constantly.
The extension works standalone as a lot-saving and search tool, or pairs with the app for full live auction automation.
Search for lots across the-saleroom and EasyLive simultaneously from the popup. Results open in a full browser tab — large images, real counts ("126 of 1,581 from the-saleroom · 51 of 242 from EasyLive"), filter by platform, sort by estimate or date, and save any lot with one click.
A Save Lot button appears on every lot page on the-saleroom.com and EasyLive as you browse. Tap it to save the lot with its image, estimate and URL. Download as a PDF with images or copy URLs for Bulk Import.
During a live auction the extension reads the asking price from the bidding page and feeds it to your bid ladder in real time — so you always know your total cost at every increment without calculating mid-auction.
Desktop only · Works on the-saleroom.com and EasyLive · No account needed to use the extension standalone
Auction rooms move fast. Calculating buyer's premium, VAT, and online fees in your head while the hammer's about to fall is a recipe for overspending.
One auction house charges differently to the next. Online platforms add their own commission. Minimum fees kick in on cheaper lots. It's a minefield.
A £500 hammer can easily become £720+ once fees and VAT are added. Many bidders only discover the real cost when the invoice arrives.
Built by auction buyers, for auction buyers. Every feature exists because we needed it ourselves.
Enter a hammer price and instantly see the full breakdown — buyer's premium, additional charges, online commission, VAT on each component, ARR, and total cost. Toggle VAT on hammer, Artist's Resale Right, and additional costs directly in the calculator.
FreeAn auto-generated ladder shows the total cost at every auction increment from the low estimate up. Rows turn green (within budget), amber (near limit), or red (over). A MAX BID marker shows your ceiling. Tap any row to set your bid instantly.
If the auction is in a different currency to your home currency, a third column automatically shows the equivalent in your currency at the current ECB exchange rate — so you always know what you're paying in the money you think in.
FreeWhen your auction is running, tap Go Live for a dedicated bidding screen. Compact lot info at the top, the bid ladder filling the screen, and Won/Lost/Pass buttons fixed at the bottom. Tap any ladder row to set your bid. Auto-advances when you close each lot. Auto-ends when all lots are done.
This app does not place bids — it's a visual calculator to help you bid smarter. You still bid on your auction platform as normal.
FreeWorks with the-saleroom.com and EasyLive. The free extension does three things. Search: find lots across both platforms simultaneously — results open in a full browser tab with large images, real counts, and one-click saving. While browsing: a 🔨 Save Lot button appears on every lot page — tap it to save that lot with its image, then download as a PDF or bulk import to the app. During live auctions: it connects the bidding page to your bid ladder in real time — the asking price highlights automatically as the auctioneer calls.
Desktop only. Without it, Live mode works manually — the ladder is fully functional, you just update the current bid yourself.
FreeThree ways to add lots — paste a single URL via + Add Lot and everything is extracted automatically (lot number, description, estimate, image, auction house, fees). Or use ⬆ Bulk Import to paste a list of URLs and import an entire sale at once. Or install the Chrome extension to get a 🔨 Save Lot button on every lot page as you browse — save as many as you like, download the list, and bulk import in one go.
FreeSave each house's fee structure — BP%, additional premium, online fee, minimum buyer's fee, VAT rate, and mode. Set custom bidding increments per house (standard, fine art, fixed £1/£5/£10, or your own table). Always verify fees against the sale T&Cs before bidding.
1 house free Unlimited with ProEach lot can override the auction house defaults. For EasyLive lots, the all-in rate (buyer's premium + internet surcharge + VAT) is applied automatically based on your registration type — adjust per lot if a specific lot has different VAT treatment. Toggle VAT on hammer for lots not under the margin scheme, add Artist's Resale Right (UK or EU sliding scale), and enter additional costs like storage, shipping, or import duties.
FreeSet a budget per lot and watch the colour change in real-time. Green when safe, amber near your limit, red when you're over. Never accidentally overspend.
FreeHave a budget? Enter the maximum price you want to pay and see the budget max hammer you can bid to. Works backwards through all fees, VAT, ARR, and additional costs to give you your ceiling.
FreeCreate named sales, track lot statuses with progress bars, see won totals per currency, and archive completed sales. Each sale shows auction houses, fee flags, and a full status breakdown at a glance.
1 sale free Unlimited with ProYour data syncs in real-time via the cloud. Set up lots on your laptop, track bids on your phone. Works offline too — syncs when you reconnect.
FreeAfter the sale, print a detailed summary, export to CSV for spreadsheets, or email yourself a receipt of won lots with full cost breakdowns.
ProSwitch between three viewing modes with a single tap. Dark mode for the saleroom, Light mode for daytime browsing, and Colour mode with warm auction-house parchment tones. All colours carefully harmonised for readability in every mode.
FreeEvery field and section has a ? icon. Tap it to see a plain-English explanation of what each setting does — buyer's premium, VAT modes, ARR, bid increments, and more. No need to open the help guide.
FreeRuns in your browser — nothing to install. Works on iPhone, Android, iPad, laptop, desktop. Designed mobile-first for use in the saleroom. Add it to your home screen for a full-screen, app-like experience.
Note: the Live Bridge browser extension requires Chrome or Firefox on desktop — it is not available on mobile. On mobile, Live mode works manually — the bid ladder is fully functional, you just update the current price yourself. For the best live bidding experience, use a desktop with the app and auction platform open side by side.
FreeUse it with any auction platform — Christie's, Sotheby's, Bonhams, Invaluable, or any house you bid with. We've built deep automation for the-saleroom.com and EasyLive Auction, with more platforms actively being added. The app is updated constantly.
Browse, import, and bid — in minutes. No card required for the free plan.
Install the browser extension and browse the-saleroom.com or EasyLive. Tap 🔨 Save Lot on any lot page to save it. Or paste individual URLs via + Add Lot. Or paste a list into ⬆ Bulk Import. More platforms being added.
Paste a lot URL and the app extracts buyer's premium, VAT, and online commission automatically. For EasyLive, it reads the all-in rate from the listing and asks which registration type you used — Free or Flat Fee. Your choice is remembered per auction. Always verify against the sale T&Cs before bidding.
The app extracts lot number, description, estimate, image, auction house, buyer's premium, VAT, and online fee automatically. The auction house profile is created for you — no manual setup.
Set a budget per lot. The bid ladder shows total cost at every increment — green when safe, amber near your limit, red when over. The reverse calculator shows your maximum hammer price.
Once the auction is running, tap Go Live. A focused screen fills your display. With the extension connected, live bid prices update on your ladder automatically as the auctioneer calls.
See sale totals by currency with home currency conversions. Print, email, or export to CSV. Archive completed sales and browse your full bidding history.
The Auction Bid Assistant works like a native app when added to your home screen — full screen, instant launch, and offline support. No app store needed.
⬆ at the bottom of the screen⋮ in the top right⊕ in the address bar (right side), or click the three-dot menu → "Install Auction Bid Assistant"A £500 hammer price at a typical UK auction house with 25% buyer's premium, 5% online fee, and 20% VAT:
The free plan gives you full functionality to try at a real auction. Upgrade when you need more.
Join thousands of auction buyers who know their true cost before the hammer falls.
Start Free — Takes 30 Seconds 🔨The Auction Bid Assistant provides estimates based on the fee information you enter. These figures are intended as a guide only and should not be relied upon as exact costs.
Auction houses may apply additional fees, charges, or taxes not accounted for in this tool, including but not limited to artist's resale rights (ARR/droit de suite), storage charges, insurance, shipping, import duties, or other levies. Fee structures can change without notice.
Auctioneersvault Ltd accepts no responsibility or liability for any discrepancy between the estimates provided by this tool and the actual costs charged by an auction house. Always confirm the full fee schedule directly with the auction house before bidding.