Charity Auction Terms Glossary

Auctions have their own vocabulary, and if you are new to the world of charity auctions and online bidding, some of the terms can feel like a foreign language. This glossary defines more than thirty of the most common auction terms in plain, everyday language, so you can bid, host, and organize with confidence. Terms are organized alphabetically within their natural groupings for easy reference.

Auction Types

Charity Auction noun

A fundraising event where items, experiences, or services are sold to the highest bidder, with all proceeds going to a nonprofit organization. Charity auctions can be held in person, online, or as a hybrid event.

Silent Auction noun

A fundraising event where items are displayed with bid sheets or online listings and guests bid over a set period without an auctioneer. The highest bid at the close wins each item. Online silent auctions run through a platform like Bid to Care over hours or days.

Live Auction noun

An auction conducted in real time with bids called out and accepted as they happen, typically led by an auctioneer. Online live auctions use countdown timers and real-time bid updates to create urgency. Live auctions feature fewer, higher-value items.

Virtual Auction noun

An auction conducted entirely online with no in-person gathering. Items are listed on a web platform, bidders sign in and bid remotely, and a countdown timer manages the close. Virtual auctions may include a livestreamed component.

Hybrid Auction noun

An auction that combines in-person and online participation. Attendees at a physical event and remote bidders online participate simultaneously. Bid to Care supports hybrid auctions through its dual-mode architecture.

Online Auction noun

An auction conducted through a web-based platform where items are listed digitally, bids are placed and tracked online, and a countdown timer manages the close. Bid to Care is an online auction platform designed for nonprofits.

Bidding Terms

Bid noun / verb

An offer to pay a specific amount for an item in an auction. To bid is to place that offer. The highest bid at the close of the auction wins the item.

Starting Bid noun

The minimum amount a bidder can offer to open bidding on an item. Typically set at 30-50% of the item's fair market value. All subsequent bids must be the starting bid or higher.

Bid Increment noun

The minimum amount by which a new bid must exceed the current high bid. If the high bid is $50 and the increment is $5, the next bid must be at least $55. Increments keep the auction moving and prevent penny-bidding.

High Bid noun

The current highest bid on an item at any given moment during the auction. The high bid and high bidder update in real time as new bids are placed.

High Bidder noun

The bidder who has placed the current highest bid on an item. The high bidder changes as new, higher bids come in. At the close of the auction, the high bidder becomes the winner.

Outbid verb

To place a bid higher than the current high bid, taking the lead from the previous high bidder. When you are outbid, another bidder has surpassed your bid, and you can place a new, higher bid to retake the lead.

Bidder Number noun

A unique identifier assigned to each bidder when they sign in to an auction. On Bid to Care, bidders sign in with their name and receive a bidder number (e.g., 101, 102). The number identifies the bidder throughout the auction.

Buy-Now Price noun

A fixed price at which a bidder can purchase an item immediately, ending the auction for that item. Not all auctions offer buy-now prices. Bid to Care focuses on competitive bidding, which typically raises more for desirable items.

Max Bid noun

The maximum amount a bidder is willing to pay for an item. Some platforms auto-bid up to a bidder's max bid. Bid to Care uses direct bidding, where bidders enter each bid amount themselves for full control.

Proxy Bid noun

A bid placed on behalf of a bidder who cannot attend the auction, often at a maximum amount with the platform auto-increasing bids up to that maximum. Bid to Care focuses on real-time direct bidding.

Pricing and Value Terms

Fair Market Value noun

The price an item would sell for in the open market between a willing buyer and seller. Disclosed in charity auction item descriptions so bidders understand the value and so the organization can provide accurate tax receipts.

Reserve Price noun

A minimum price below which an item will not be sold, even if bids are placed. Most charity auctions do not use reserve prices because the goal is to raise funds. Bid to Care uses starting bids rather than reserves.

Hammer Price noun

The final winning bid amount at the moment the auction closes (when the auctioneer's hammer falls, or in an online auction, when the timer reaches zero). The amount the winner pays for the item.

Winning Bid noun

The highest bid on an item at the close of the auction. The bidder who placed the winning bid is the winner and pays that amount for the item.

Minimum Bid noun

The lowest acceptable bid at any point in the auction. At the start, the minimum bid is the starting bid. After bids are placed, the minimum bid is the current high bid plus the bid increment.

Event and Operations Terms

Auctioneer noun

The person who leads a live auction, calling out items and bid amounts and accepting bids from the audience. In online auctions, the platform handles bid tracking automatically, so an auctioneer is optional but a narrating host adds value.

Countdown Timer noun

A visible timer that counts down the remaining time in an auction. When it reaches zero, the auction closes and winners are announced. Bid to Care displays a live countdown to all participants. Timers can be set from 1 minute to 7 days.

Bid Sheet noun

A paper form used at in-person silent auctions where bidders write their name, bidder number, and bid amount. Online auctions like Bid to Care replace bid sheets with digital bidding.

Item Procurement noun

The process of soliciting and collecting donated items for a charity auction. Involves reaching out to businesses, board members, and community supporters for donations.

Donor noun

A person or business that donates an item, service, or money to the charity auction. Donors may receive recognition in auction materials and a tax receipt for the value of their donation.

Sponsor noun

A business or individual that provides financial support for the auction event in exchange for recognition. Sponsorships can underwrite event costs so that more auction revenue goes directly to the cause.

Gift Basket noun

A bundle of related donated items packaged together as a single auction item, often with a theme (e.g., gourmet food, wine, spa). Gift baskets typically sell for more than the items would individually.

Headline Item noun

A high-value, high-excitement auction item that draws people to the auction. Examples include vacation packages, exclusive experiences, and one-of-a-kind items. Every auction benefits from one or two headline items.

Technology Terms

Real-Time Bidding noun

A bidding system where the current high bid and high bidder update instantly across all devices as bids are placed, without requiring a page refresh. Bid to Care uses real-time bidding via BroadcastChannel (Same-WiFi) or a Cloudflare Worker backend (Cross-Network).

Cross-Network Bidding noun

Bidding that syncs across devices on different networks (not just the same WiFi), enabling bidders anywhere in the world to participate in real time. Bid to Care achieves this with a Cloudflare Worker and KV storage backend.

Host Control Panel noun

The interface the auction organizer uses to manage the auction: add items, set timers, start and stop the auction, and monitor bids. Bid to Care's host panel (host.html) includes a mode indicator showing Same-WiFi or Cross-Network mode.

Mode Indicator noun

A visual element on Bid to Care's host control panel that shows whether the auction is running in Same-WiFi Mode (BroadcastChannel, for in-person events) or Cross-Network Mode (Cloudflare Worker, for remote bidders). Helps the host confirm the connection type before going live.

Winner Announcement noun

The automatic display of each item's winner (name, bidder number, and final bid) when the auction timer ends. Bid to Care generates winner announcements automatically and shows the total amount raised for charity.

Tax and Legal Terms

Tax-Deductible adjective

Describes a donation or portion of a payment that can be deducted from taxable income. In a charity auction, the difference between the winning bid and the item's fair market value may be tax-deductible. Consult a tax professional for specifics.

501(c)(3) noun

A U.S. tax-exempt nonprofit organization designation. Most organizations hosting charity auctions are registered 501(c)(3) nonprofits, which allows donations to be tax-deductible and is often required by state fundraising regulations.

Charitable Solicitation Registration noun

A registration required by some states for organizations that solicit charitable donations, including through auctions. Requirements vary by state. Check with your state's attorney general office or secretary of state.