How to Read Best Bid and Ask on Polymarket (US 2026)

How We Verify

Checked Aug 8, 2026

We checked Polymarket US’s published Glossary (Bid: highest price buyers are willing to pay; Ask: lowest price sellers are willing to accept; BBO / Best Bid and Offer: the best bid and ask currently available — the tightest pair at the top of the book; Spread; Order book; Size), Prices & Market Data (central limit order book; Bids; Asks (offers); the BBO is the highest bid and the lowest ask — the price a market order would trade at if size is there; market states Open / Pre-open / Suspended / Halted / Expired), Spreads (you buy at the ask and sell at the bid), How are Polymarket odds determined? (prices update when a buy or sell is matched; Polymarket US does not set prices), Browse Markets (market question, current Yes and No prices, resolution date), Place a Trade (tap any market to open it), Website vs App, official Markets BBO API fields (bestBid, bestAsk, lastTradePx, currentPx), official Get Market Book fields (bids, offers, lastTradePx), and the official US docs index (llms.txt). Official Place a Trade, Official Browse Markets, Official Prices & Market Data, and Official Glossary do not reprint a retail tab labelled Best Bid, Best Ask, or Inside on the swipe we checked. We will not invent one. If the live US card already prints Best bid, Best ask, Bid, Ask, or BBO, we describe the action and tell you to follow that live label. We do not reprint a live bid, ask, last print, or spread. Last checked August 2026.

Reviewed by: Scott, Editor
Terms checked against: Operator-published terms, August 8, 2026
Hands-on testing: In progress — updates to follow

Who this guide is for

US adults who can already see a Polymarket card and now need to read the inside quote on that market — the best bid versus the best ask they would actually hit. Official Glossary names Bid, Ask, and BBO. If the live card says Best bid or Best ask, follow that word. This is not how to read the order book, not how to read last price, not how to read liquidity, and not how to set a limit price. Those pages are the sitting ladder, the last print, posted-size risk, and the cents you type. This page is only the two tops you would hit on one ticket. Then we link out. Polymarket is the only live outbound on this page.

Where the inside quote lives

Official Browse Markets names current Yes and No prices on each card — not Best Bid. Official Glossary names Bid, Ask, and BBO. Official Place a Trade does not reprint a Best Bid chip on the swipe we checked. If the live app uses a different label, follow that label — we will not invent one.

Open one ticket — the inside quote sits on that market

Official Browse + Place a Trade

Official Browse Markets: each tile shows the market question, the current Yes and No prices, and a resolution date. Official Place a Trade: tap any market to open it. Official Prices & Market Data: that opened ticket is a central limit order book. The inside quote is the top pair on that book — the best bid and the best ask — not a home-screen chip. Official Browse Markets does not list Best Bid or Best Ask on the tile. We will not invent one. If the sports desk is hidden where you live, stop.

Official US retail help does not reprint a Best Bid / Best Ask tab

Action, not an invented header

Official Glossary names Bid, Ask, and BBO. Official Prices & Market Data names best bid, best ask, and Asks (offers). Official Place a Trade, Official Browse Markets, Official Prices & Market Data, and Official Glossary do not reprint a retail column or tab labelled Best Bid, Best Ask, or Inside on the swipe we checked. We will not invent one. The action is: on that opened ticket, find the highest price buyers will pay and the lowest price sellers will take. If the live control is labelled Best bid, Best ask, Bid, Ask, BBO, or something else — or is missing — use the live screen.

API bestBid / bestAsk are field names — not a phone chip

Official Markets BBO API

Official Markets BBO API names bestBid and bestAsk, plus lastTradePx and currentPx. Official Get Market Book names bids and offers. Those are published field names. Official Place a Trade does not reprint them as a Best Bid chip. We will not paste an API field onto the US swipe as if the retail page printed that menu. Official Website vs App: US residents read the live card in the Polymarket US app, not on polymarket.com.

Official Bid / Ask / BBO · no invented Best Bid tab · follow live labels

The pair you would actually hit

Official Spreads is which side a take pays. Official Prices & Market Data is the BBO. Official Glossary names that tightest pair. We name the sides. We do not reprint a live quote.

Best ask — the price a take-now buy would hit

Official Spreads + Prices & Market Data

Official Glossary: the ask is the lowest price sellers are willing to accept. Official Spreads: when you buy, you pay the ask. Official Prices & Market Data: a market order fills at the best available price on the other side right now — the BBO. If you are lifting size, the number you would actually hit is that best ask, not a last print and not a sportsbook hold. We do not reprint a live ask.

Best bid — the price a take-now sell would hit

Official Spreads + Glossary

Official Glossary: the bid is the highest price buyers are willing to pay. Official Spreads: when you sell, you receive the bid. Official Prices & Market Data: that top bid is the other half of the BBO. If you are hitting the book to get out, the number you would actually receive is that best bid — not the Yes/No cents on the tile, and not a house cash-out line. We do not reprint a live bid.

The BBO is that pair — the inside quote, not the whole book

Official Glossary + Prices & Market Data

Official Glossary: BBO (Best Bid and Offer) is the best bid and ask currently available — the tightest pair at the top of the book. Official Prices & Market Data: that is the price a market order would trade at if size is there. This page stops at those two tops. How to read the order book is the rest of the sitting ladder. How to read liquidity is posted size under those prices. How to set a limit price is the cents you type if you do not want to take that pair. We link those walks instead of cloning them.

Buy hits the ask · sell hits the bid · BBO = inside quote · no live pair

Last price is not the inside quote

Official Markets BBO API names lastTradePx and names bestBid / bestAsk. Official How are Polymarket odds determined? reprints that match when orders fill. Official Prices & Market Data is the live pair you can take. See how to read last price for the stamp — this page does not repeat that print walk.

Last price is a completed match — history

Official lastTradePx + odds FAQ

Official Markets BBO API and Official Get Market Book name lastTradePx as the most recent trade. Official How are Polymarket odds determined?: prices update whenever a buy or sell is matched. That stamp already printed. It is not the best bid, not the best ask, and not a promise the next swipe pays the same cents. How to read last price is that stamp. This page does not clone it.

The inside quote is the now-pair — what a take would hit

Official Prices & Market Data

Official Prices & Market Data: a market order fills at the best available price on the other side right now. Official Spreads: a buy pays the ask; a sell receives the bid. A last print can sit one number; the best ask can sit another. Official How are Polymarket odds determined?: Polymarket US does not set those prices — other traders do. Read the sitting sides first. We do not reprint either number.

Yes/No cents on the tile are a display — not the hit you would take

Official Browse Markets

Official Browse Markets shows current Yes and No prices on the card. That tile is a display. The inside quote is the best bid versus the best ask on the opened ticket — the pair a take-now order would actually hit. We will not treat the home-screen cents as a confirmed Best Bid header, and we will not reprint a live Yes or a live No.

lastTradePx = history · BBO = sitting pair you would hit · Yes/No tile ≠ the take

How to read the best bid and best ask

Step 1

Open one US market — not a tweet, and not the full book how-to

Find the market, then look at a single ticket. Official Website vs App: US residents browse and trade in the Polymarket US app, not on polymarket.com. Official Browse Markets: the card shows the question, the current Yes and No prices, and a resolution date. Official Place a Trade: tap the market to open it. Official Prices & Market Data: confirm the market is Open if you intend to trade later. If the sports desk is hidden where you live, stop. How to read the order book is the whole sitting ladder. This page is only the inside quote.
Step 2

Find the best bid and the best ask if official help or the live card shows them

Official Glossary names Bid, Ask, and BBO. Official Prices & Market Data names the highest bid and the lowest ask as the pair a market order would trade at. Official Place a Trade does not reprint a retail header labelled Best Bid, Best Ask, or Inside on the swipe we checked. If the live card already uses Best bid, Best ask, Bid, Ask, or BBO, follow that live label. If no such word is there, the action is still: find the highest price buyers will pay and the lowest price sellers will take on that opened ticket. Do not invent a tab.
Step 3

Read which side you would actually hit — buy the ask, sell the bid

Official Spreads: a take-now buy pays the ask; a take-now sell receives the bid. Official Prices & Market Data: that now-fill is the BBO if size is there. The inside quote is those two tops, not the gap between them and not the depth under them. We do not reprint a live pair. How to read the bid-ask spread is the gap. How to read liquidity is sitting size. This page only names the sides you would hit.
Step 4

Treat last price as history — it is not the best bid or the best ask

Official Markets BBO API names lastTradePx as the most recent match, and names bestBid and bestAsk as the sitting tops. Those are different clocks. Official How are Polymarket odds determined?: the last print updates when orders fill. Official Prices & Market Data: a market order still pays the best available price on the other side right now. A last print can sit far from that ask. How to read last price is the stamp. Do not mash it onto the inside quote.
Step 5

Then leave the order book, last price, liquidity, and limit price on their own pages

How to read the order book is the public ladder. How to read last price is the last match. How to read liquidity is posted size as a fill risk. How to set a limit price is the cents you type on a new order if you do not want to take the BBO. Event contracts can settle at zero. Trade only what you can afford to lose. Nothing here is investment advice.

This is not the order book, last price, liquidity, or a limit you type

The public ladder lives on How to read the order book on Polymarket. Official Get Market Book stats name lastTradePx. That stamp lives on How to read last price on Polymarket. Official Liquidity is posted size as a fill risk — How to read liquidity on Polymarket. Official Orders & Trading is the cents you set before a rest — How to set a limit price on Polymarket. This page will not repeat those click paths, invent a Best Bid tab, or reprint a live quote.

The gap between those two tops lives on How to read the bid-ask spread. The take-versus-rest decision after you already see the pair lives on How to read the Polymarket order book. Who added size versus who lifted it is How to tell maker from taker. We do not clone those either.

Blocked and contested states

Reported unavailable as of June 2026: Arizona, Illinois, Massachusetts, Maryland, Michigan, Montana, Nevada and Ohio. That list is not a promise it stays still — litigation around sports event contracts in particular can narrow or shift access. If you are in a listed state, do not treat a best bid or best ask as a price you can hit. If you are in Florida or another green-light state, still confirm the ticket appears and still shows a sitting pair before you send money.

Age is 18+ with identity verification. That is a different gate from the 21+ / responsible-gambling frame on our DFS pages, because these are traded financial instruments. If you also want NFL DFS, start at the picks hub — those slate-lock clocks do not carry over. Compare platforms on the prediction-markets hub.

What you will not get from this page

A dollar welcome match, a paste-this promo code, an invented Best Bid / Best Ask / Inside tab Official Place a Trade does not print, a live bid, ask, last, or spread, a cloned order-book / last-price / liquidity / volume / limit-price / maker-versus-taker / open-orders walkthrough, a newsletter form, or claim buttons for Kalshi, DraftKings, FanDuel, Underdog, Sleeper, PrizePicks, Hard Rock or BetRivers. We could not verify a standing official US welcome bonus on Polymarket’s own terms. Other publishers’ partner codes are theirs; we do not copy them. The honest user-facing line is still US access via CFTC-regulated QCEX — official Glossary names Bid, Ask, and BBO, official Spreads says you buy the ask and sell the bid, official US help does not reprint a Best Bid chip we invent, last price is not the inside quote, that pair is not a sportsbook line, and if the live card prints Best bid, Best ask, or BBO, use that live word. Last verified August 8, 2026.

Frequently Asked Questions

Where do I find the best bid and best ask on a Polymarket US market?

Official Place a Trade: tap a market from the home screen to open the ticket. Official Glossary names Bid, Ask, and BBO (Best Bid and Offer) as the tightest pair at the top of the book. Official Prices & Market Data: that pair is the highest bid and the lowest ask — the price a market order would trade at if size is there. Official Place a Trade does not reprint a retail header labelled Best Bid or Best Ask on the swipe we checked; if the live card already prints Best bid, Best ask, Bid, Ask, or BBO, follow that live word. The action is: find the highest price buyers will pay and the lowest price sellers will take on that opened ticket. The only live claim on this page hops through /go/polymarket.

Does official US help print Best Bid or Best Ask on the card?

Official Glossary names Bid, Ask, and BBO. Official Prices & Market Data names best bid, best ask, and Asks (offers). Official Markets BBO API names bestBid and bestAsk. Official Place a Trade, Official Browse Markets, Official Prices & Market Data, and Official Glossary do not reprint a retail header labelled Best Bid, Best Ask, or Inside on the US swipe we checked. We will not invent that header. If the live US card uses one of those words, use the live label. If it does not, describe the action: read the highest bid and the lowest ask on the opened ticket.

Which price would I actually hit — the best bid or the best ask?

Official Spreads: when you buy, you pay the ask; when you sell, you receive the bid. Official Prices & Market Data: a market order fills at the best available price on the other side right now — the BBO. A take-now buy hits the best ask. A take-now sell hits the best bid. That pair is the inside quote. We do not reprint a live pair. Size sitting under those prices lives on How to read liquidity. The rest of the ladder lives on How to read the order book.

Is last price the same as the best bid or best ask?

No. Official Markets BBO API names lastTradePx as the most recent trade, and names bestBid and bestAsk as the sitting tops. Official Prices & Market Data: a market order still fills at the best available price on the other side right now. Official How are Polymarket odds determined?: prices update when the next orders match. A last print is history. The best bid and best ask are the now-quote you would actually hit. How to read last price is that stamp. This page is the inside quote.

Is this the same as reading the order book, last price, liquidity, or setting a limit price?

No. How to read the order book is the public bids and asks sitting on the market — the whole ladder. How to read last price is the last match. How to read liquidity is posted size as a fill risk. How to set a limit price is the cents you type on a new order. This page is only the inside quote — the best bid versus the best ask you would actually hit. We link those walks instead of cloning them.

Is this the same as the bid-ask spread, Yes/No prices, or maker versus taker?

No. How to read the bid-ask spread is the gap between those two tops, and why a wide gap costs a market order. How to read Yes/No prices is the cents-as-chance display on the tile. How to tell maker from taker is who added size versus who lifted it. This page stops at naming the two prices you would hit. We link out instead of cloning those click paths.

Is reading a Polymarket best bid and best ask the same as reading a sportsbook line?

No. Official What is Polymarket US / Official Prices & Market Data: Polymarket US runs a central limit order book. Other traders posted this pair. A sportsbook line is a house number you take or leave. See prediction markets vs sportsbooks if you wanted that parked hold. There isn’t one. Nothing here is sportsbook advice or investment advice.

Can I read a Polymarket inside quote in every US state?

No. As of our June 2026 check Polymarket was reported unavailable in Arizona, Illinois, Massachusetts, Maryland, Michigan, Montana, Nevada and Ohio. Florida is a green-light state. Sports markets are the most legally contested category anywhere. Confirm the ticket still appears — and still shows a sitting bid and ask — before you treat either side as a price you can hit.

Which claim button is actually live on this page?

Polymarket only. The claim button hops through /go/polymarket. There is no /go/kalshi, DraftKings, FanDuel, Underdog, Sleeper, PrizePicks, Hard Rock or BetRivers claim here. We do not invent tracking URLs.

Is there a Polymarket best-bid bonus or promo code on this page?

No. We do not publish a dollar welcome or a promo code. Partner codes that appear on other sites belong to those publishers. Confirm any live terms in the Polymarket US app. If you open Polymarket through our link we may earn a commission at no extra cost to you — that is not a user bonus.

Is reading a Polymarket inside quote the same as reading a sportsbook board or an NFL DFS slate?

No. A sportsbook posts a house line you take or leave. Daily fantasy is a state-licensed gambling product — often 21+, with a 1-800-GAMBLER frame. Event contracts are CFTC-regulated financial/derivatives products, typically 18+ with KYC. Other traders post this bid and this ask. A contract can settle at zero. There is no protected bonus floor.

Advertising disclosure: Polymarket links are affiliate links — we may earn a commission at no cost to you, which never affects our ratings. Kalshi, DraftKings, FanDuel, Underdog, Sleeper, PrizePicks, Hard Rock and BetRivers have no live outbound claim on this page. Event contracts are CFTC-regulated financial products, not gambling. Trading involves risk and you can lose money, including your entire stake. Not investment advice. 18+. DFS pages on this site use a separate 21+ / 1-800-GAMBLER frame. Availability and terms can change — confirm current terms on Polymarket. Last verified August 8, 2026.