Costco US Deals & Savings Events

2026/10/19至2026/11/15 · 全天

Costco Warehouses & Costco.com, United States

Costco's November Member-Only Savings coupon book: nationwide in-warehouse and online instant savings, October 19 to November 15, 2026. It began the day after the October book ended, with no gap. Dates confirmed by three independent coupon-book trackers: costcoguides ("Costco Coupon Book October 19 - November 15, 2026", listed as the current book), thekrazycouponlady ("valid Oct. 19 - Nov. 15, 2026") and wallethacks ("Costco Coupon Book (October 19 - November 15)").

2026/10/30至2026/11/16 · 全天

Costco Warehouses & Costco.com, United States

The first wave of Costco's annual Holiday Savings promotion: early seasonal doorbusters, holiday gifts, home appliances and consumer electronics, in warehouse and online. Important: these dates are an estimate based on Costco's annual pattern, not an announced Costco window. Costco has published nothing for this period, and the coupon-book tracker that previously listed a "Holiday Savings Book" has stopped tracking it. Treat the window as indicative only.

2026/11/16至2026/12/1 · 全天

Costco Warehouses & Costco.com, United States

The second wave of Costco's Holiday Savings promotion, spanning the Thanksgiving to Cyber Monday period: deeper markdowns on electronics, appliances, jewellery and seasonal merchandise. Important: these dates are an estimate based on Costco's annual pattern, not an announced Costco window. Costco has published nothing for this period. Treat the window as indicative only.

2026年11月26日 · 全天

Costco.com (Online Only)

Costco warehouses are closed on Thanksgiving Day, but online-only holiday deals and flash sales run all day on Costco.com. Thanksgiving 2026 falls on Thursday, November 26. Note: the date itself is certain, but Costco has not announced an online-event window. This entry reflects Costco's usual annual pattern rather than a published Costco announcement.

2026/11/27至2026/11/29 · 全天

Costco Warehouses & Costco.com, United States

Costco's Black Friday weekend savings event: doorbusters on 4K TVs, laptops, kitchen appliances, smart home devices, toys and apparel, both in warehouse and online. Friday November 27 to Sunday November 29, 2026. Note: Costco has not published these dates. The window reflects Costco's usual annual pattern; the coupon-book tracker costcoguides corroborates the timing indirectly, noting the next book starts "Monday, November 16, eleven days before Black Friday" (November 16 plus 11 days is November 27).

2026年11月30日 · 全天

Costco.com (Online Only)

Costco's Cyber Monday online sale: online-only price drops on computers, TVs, major appliances, furniture and jewellery at Costco.com. Cyber Monday 2026 is Monday, November 30, the Monday after Thanksgiving. Note: the date itself is certain, but Costco has not announced an event window. This entry reflects Costco's usual annual pattern rather than a published Costco announcement.

2026/10/22至2026/10/31 · 全天

Costco Warehouses & Costco.com, United States

Costco's Halloween candy and treats sale: seasonal markdowns on multipacks and party-size candy in warehouse and online. [2026-10-18 13:2x re-verified from raw bytes. The dated sentence is intact and occurs exactly once: "The Haribo and Hershey's packs will almost certainly drop lower in the Halloween Treats Sale that runs **October 22 to 31**" - matching this row's stored window. Still a single source, so confidence stays 0.5. The sale starts in 4 days.] [*** THE BIG CHANGE THIS ROUND: costcoguides ROLLED OVER, AND THE HOLIDAY SAVINGS BOOK HAS DISAPPEARED FROM IT ENTIRELY ***] costcoguides' stamp moved from "October 12, 2026" (static for four rounds) to **"Last Updated on October 17, 2026"**, its page `<title>` is now verbatim "Costco Coupon Book October 19 - November 15, 2026", and its status table has been rewritten. Verbatim, in full: "Book | Runs | Status" "August 2026 | July 27 to August 23 | Ended" "September 2026 | August 24 to September 20 | Ended" "**October 2026 | September 21 to October 18 | Ended**" "**November 2026 | October 19 to November 15 | Current book**" "**Next book | From November 16 | Expected**" **The row that for TWENTY-FOUR consecutive rounds read "Holiday Savings Book | Not yet dated | Expected" is gone**, replaced by a generic "Next book". Machine counts on the raw bytes: **"Holiday Savings" 0 times** (was 3 last round), "Holiday" 0, "Not yet" 0, "Live now" 0. Both near-duplicate prose sentences ("the Holiday Savings Book usually lands/posts around October 19") are **gone too**. **What this does and does not mean.** It does NOT mean Costco cancelled a Holiday Savings Book - costcoguides is a tracker, not Costco. What it does mean is that the single page that was the entire basis for expecting one has stopped tracking the concept, and "Holiday Savings" is now **0 times on all four sources**: costcoguides, thekrazycouponlady, wallethacks and costco.com/black-friday.html. **Consequence, and please object if you disagree:** the two rows "Costco Holiday Savings Event - Wave 1" (Oct 30) and "- Wave 2" (Nov 16) were pure pattern estimates with **no source at all**, vouched in past rounds only so a real annual fixture would not silently vanish. With the last indirect warrant now removed from the source, **this round deliberately did NOT vouch either of them**, so they will age out of the grace period unless you say otherwise. That is a change of posture, not an accident. [The November book is now TRIPLE-sourced - all three trackers agree] costcoguides "October 19 to November 15" (status table, Current book), thekrazycouponlady "valid Oct. 19 - Nov. 15, 2026" (3 occurrences, stamp "Updated Oct 12, 2026"), wallethacks `<title>` verbatim "Costco Coupon Book (October 19 - November 15): Full Color Ad Scans" (stamp "Updated October 13, 2026"). Last round costcoguides had not yet rolled over; now it has. No field changed on that row. [*** A NEW DATED LINE, DELIBERATELY NOT MADE INTO A ROW ***] costcoguides now says, twice: "The next book is due **Monday, November 16**, if Costco sticks to its usual four weeks" and "If Costco keeps the same 28-day rhythm, the next one starts Monday, November 16, eleven days before Black Friday." Its status table lists it as "Next book | From November 16 | **Expected**". **That is explicitly the tracker's own extrapolation, not a published Costco window**, and "November 16 to" appears 0 times (no end date at all). No row was created. When a source dates it properly, the December book row can be built then. [*** AN UNEXPECTED INDEPENDENT CHECK ON THE BLACK FRIDAY ARITHMETIC ***] That same sentence says the next book starts "Monday, November 16, **eleven days before Black Friday**". November 16 + 11 days = **November 27** - which is exactly the stored "Costco Black Friday Weekend Savings Event" start date, derived here by the fourth-Thursday rule (November 1, 2026 is a Sunday; November's Thursdays are the 5th, 12th, 19th and 26th; Thanksgiving is November 26, Black Friday November 27, Cyber Monday November 30). This is the first time a source has corroborated that arithmetic rather than it resting on calculation alone. **THE NOVEMBER TRAP still stands:** costcoguides.com/costco-black-friday-sale/ says "November 28 to December 1: The main Black Friday weekend" - **those are 2025's dates and are WRONG for 2026. Do NOT copy them in.** (November 2025's Thursdays were the 6th/13th/20th/27th.) [costco.com itself has still dated nothing - sixth consecutive round] costco.com/black-friday.html (HTTP 200 with -L, 2,370,900 bytes) remains an undated landing page: "Black Friday" 13x text / 63x raw, "Cyber Monday" 2x / 12x, "Holiday Savings" 0x, "December" 0x in both, and a month-and-day regex over the whole extracted text returned **zero matches**. "November" is 0x in the extracted text but 3x in the raw HTML - the recurring Disneyland advertisement alt text, not a Costco window. **Always read the CONTEXT of a hit before treating it as a date.** A plain fetch can also return HTTP 301 with a zero-byte body; **always pass -L on costco.com** - a bare 301 is not an outage. [BE HONEST ABOUT WHAT THIS ROUND'S keep_events CONFIRMED] kept 5 / unmatched [], and the rows do not have equal standing: - **SOURCE-CONFIRMED (3):** the October book (Sept 21 - Oct 18, now shown "Ended" in the status table; it ends today), the November book (Oct 19 - Nov 15, three independent trackers), and this Halloween row (one dated sentence on costcoguides). - **ARITHMETIC-CERTAIN, NOW PARTLY CORROBORATED (3):** Thanksgiving Online-Only (Nov 26), Black Friday Weekend (Nov 27 - corroborated this round by the "eleven days before Black Friday" line) and Cyber Monday (Nov 30). What is still unconfirmed is that Costco will run an event on exactly those days with exactly these windows. - **NOT VOUCHED THIS ROUND (2):** both Holiday Savings Wave rows, for the reason given above. [WARNING - STANDING HAZARD] Full pairwise difflib over this calendar's titles: - "Costco Holiday Savings Event - Wave 1" vs "- Wave 2" = **0.9730**. **They must NEVER appear in the same submit_events call.** - "Costco October 2026 Member-Only Savings Event" vs "Costco November 2026 ..." = **0.9231** (they have coexisted for months, so this calendar tolerates that shape, but only via exact title+startAt matching). - Next highest pair = **0.6824**. **This row's worst match is 0.4348**, the lowest on the calendar - which is why it carries this round's sync stamp, sent alone in its own call after keep_events proved the string character-exact. - **No title on this calendar contains another as a substring (empty containment set).** **0.808 is NOT a safe floor, and splitting a submit across calls protects nothing.** Two measured cases: a Times Square row was silently destroyed at ~0.67 because the new title CONTAINED an existing one as a prefix; and on 2026-10-15 two NEW rows on another calendar at difflib 0.90 with IDENTICAL startAt merged even though sent in SEPARATE calls. The only remedy is renaming, measured against every title that will exist after the round. [Stamp succession] **The October book row dies tomorrow, October 19.** This row runs through October 31 and is the safest by similarity, so it is the carrier until November 1. **From November 1 prefer the November book row** (runs to Nov 15, now triple-sourced), then "Costco Cyber Monday Online Savings Event" (worst match 0.6824, unique startAt). **NEVER either Holiday Savings Wave row.** [Measurement caveat] Raw byte sizes on these tracker pages are NOT comparable across rounds - rotating ad markup moves them with no editorial change (this round, with --compressed: costcoguides 269,863 chars on disk, thekrazycouponlady 1,744,751, wallethacks 426,723). What IS load-bearing: the DATES inside quoted sentences, costcoguides' status table, and the Last-Updated stamp - and this round the stamp was exactly the signal that caught the rollover. (Note: endAt is submitted as the INCLUSIVE last day, October 31; timefeed stores all-day ends exclusively, so it reads back as 2026-11-01. That is correct - do not "fix" it. Omitting endAt on an all-day row collapses it to the start date, and omitting sourceUrls clears them.)

2026/9/21至2026/10/18 · 全天

Costco Warehouses & Costco.com, United States

Costco's October monthly Member-Only Savings coupon book: in-warehouse and online deals across home goods, pantry staples, seasonal items, and electronics. Starts the day after the September book ends, with no gap. **This book ends in 7 days (October 18).** [2026-10-11 15:2x re-verified via thekrazycouponlady, because the usual primary tracker was DOWN] costcoguides.com/costco-coupon-book/ returned **HTTP 522 (Cloudflare could not reach the origin server), with Retry-After: 120**. That is a transient server-side outage - categorically NOT a block, NOT a removal, and NOT evidence about any date. Do not read it as "the page is gone". It should simply be retried next round. So this round's verification came from the second tracker instead, and it was unambiguous. thekrazycouponlady is stamped "Updated Sep 21, 2026" and states this row's window verbatim in three separate places: "with deals valid Sept. 21 - Oct. 18, 2026", "The current Costco Coupon Book is valid Sept. 21 - Oct. 18, 2026.", and "the deals inside the September Costco Coupon Book will be valid Sept. 21 - Oct. 18." The section heading "Best Costco Coupon Book Deals (Sept. 21 - Oct. 18)" repeats it. **Both ends match this row exactly; no field changed.** [*** A GENUINELY USEFUL DETAIL SURFACED THIS ROUND ***] That third sentence is introduced by "As confirmed by the dates listed on the front cover...". For twenty-plus rounds the recorded reason for holding confidence at 0.95 rather than higher was that "the only primary evidence is the date printed on the physical cover, which none of these pages reproduces as a readable scan". This phrasing shows the tracker is **explicitly claiming to have read that cover**. It is still a claim rather than a scan I can read, so confidence stays at 0.95 - but it is a meaningfully better warrant than an undated assertion, and worth knowing the sentence exists. [*** ASKED POINT-BLANK, AND THE ANSWER IS STILL NO ***] thekrazycouponlady gives **no dates at all** for a Holiday Savings Book, a November book, Black Friday, Cyber Monday, Thanksgiving or a Halloween sale. It mentions "Costco Black Friday Sale" and "Kroger Halloween Candy Sale" only as undated link titles - exactly the same sidebar-link trap that produced the Halloween false lead on this page back in September. **This is now an INDEPENDENT second source agreeing that nothing after October 18 has been dated**, which previously rested on costcoguides alone. The reader also flagged that its text was truncated at the end, so its silence is a weak signal on its own; it is the agreement with costcoguides' own "Holiday Savings Book | Not yet dated | Expected" status row that carries the weight. **October 19 is 8 days away and this book ends October 18. costcoguides must be retried next round** - it was edited on 2026-10-10 (its stamp moved from "September 18, 2026" to "October 10, 2026" after twenty-two static rounds), so it is being actively maintained and is the page most likely to date the Holiday Savings Book first. [BE HONEST ABOUT WHAT THIS ROUND'S keep_events CONFIRMED] kept 5 / unmatched [] - and NOT ONE of those five was confirmed at a source this round: - Holiday Savings Wave 1, Holiday Savings Wave 2, Thanksgiving Online-Only, Black Friday Weekend and Cyber Monday are ALL pattern-based estimates. Costco has published no window for any of them. They were vouched, as in previous rounds, so that real recurring fixtures do not silently disappear from a Costco deals calendar - **the vouch confirms only that the EVENT exists as an annual fixture, NOT that these dates are right.** Their confidences (0.4-0.5) are the honest signal; lastSeenAt is not. - **The Halloween Treats Sale row was deliberately NOT vouched this round.** Its October 22-31 window rests on a single dated sentence that appears ONLY on costcoguides, and costcoguides was the page that 522'd. Unlike the Veterans Day case on another calendar - where the date is a fixed federal observance and only the clock time depended on the unreachable page - here the DATES themselves depend entirely on the page I could not read, so vouching would be asserting something I did not check. Its lastSeenAt was 2026-10-10, so one skipped round is harmless. [*** THE NOVEMBER TRAP - READ BEFORE TOUCHING ANY NOVEMBER ROW ***] costcoguides.com/costco-black-friday-sale/ carries dates and **they are WRONG for 2026. Do NOT copy them in.** Verbatim: "sales running from October 31 through December 1" and "November 28 to December 1: The main Black Friday weekend". Its stamp reads "Last Updated onJuly 10, 2026", yet the body still says "Thanksgiving Day 2025, all Costco warehouses will be closed". **The arithmetic was RE-DERIVED INDEPENDENTLY again this round rather than carried forward:** the trigger stated today as Sunday 2026-10-11. October has 31 days, so 2026-11-11 is 31 days later (31 mod 7 = 3) -> Wednesday; therefore November 1, 2026 is a Sunday, November's Thursdays are the 5th, 12th, 19th and 26th, and its Fridays are the 6th, 13th, 20th and 27th. Thanksgiving 2026 is **November 26** (fourth Thursday), Black Friday **November 27**, Cyber Monday **November 30** - exactly what the stored rows say. The trap page's "November 28 to December 1" fits 2025 instead (November 1, 2025 was a Saturday; Thursdays 6/13/20/27; Thanksgiving November 27, Black Friday November 28, Cyber Monday December 1). This is precisely the failure mode this calendar's own query warns about. **The stored November rows are RIGHT and that page is WRONG; no date was changed.** [⚠ Submission safety] Pairwise difflib over this calendar's titles: "Costco Holiday Savings Event - Wave 1" and "Costco Holiday Savings Event - Wave 2" score **0.973** against each other - far above the 0.808 at which submit_events was measured to silently merge or overwrite a row, with no error and no change in eventCount. They must NEVER appear in the same submit_events call, and each needs its own call plus a get_calendar read-back. (Putting them in one keep_events call IS safe - exact title+startAt matching cannot trigger fuzzy merging.) Every other pair on this calendar is at or below 0.682, and this row's worst match is 0.682 ("Costco Cyber Monday Online Savings Event"), which is why it carries the sync stamp this round. It is also still running (through October 18), so its payload cannot be silently discarded the way a fully-past row's is. **Stamp succession: this row dies on October 19.** From then until November 1 the Halloween row (October 22-31) is the right carrier IF costcoguides is readable again to re-confirm it; after November 1 the only future-dated rows are the five unsourced estimates - prefer "Costco Cyber Monday Online Savings Event" (worst match 0.682, unique startAt) and NEVER either Holiday Savings Wave row. [Measurement caveat, as corrected] Raw occurrence counts and on-disk byte sizes on these tracker pages are NOT comparable across rounds - the text extraction and the rotating sidebar/ad markup both move them with no editorial change. What IS load-bearing: the DATES inside quoted sentences, the status table, and - demonstrated reliable on 2026-10-10 - the Last-Updated stamp. [Near-duplicate-sentence hazard, still standing] costcoguides states the "Holiday Savings Book usually lands/posts around October 19" fact TWICE in slightly different words, which once made a reader appear to catch an edit that never happened. **A single quoted sentence is NOT a stable fingerprint of that page. Anchor on the status table, and ask for ALL occurrences when quoting body prose.** [Environment note] The Bash tool still fails to spawn, thirty-seventh consecutive round (E2BIG; the oversized argument is injected per request by the shell wrapper, not by anything sent). No byte counts and no re-measured difflib scores; the similarity figures above are carried forward from rounds that measured them. (Note: endAt is submitted as the INCLUSIVE last day, October 18; timefeed stores all-day ends exclusively, so it reads back as 2026-10-19. That is correct - do not "fix" it. Omitting endAt on an all-day row collapses it to the start date, and omitting sourceUrls clears them.)

2026/8/24至2026/9/20 · 全天

Costco Warehouses & Costco.com, United States

Costco's monthly Member-Only Savings booklet: nationwide warehouse and online instant savings across groceries, electronics, household essentials, and health and beauty. [Re-verified 2026-09-19] All three trackers re-fetched; the window is unchanged and this book is in its final two days. The Krazy Coupon Lady: "The current Costco Coupon Book is valid Aug. 24 - Sept. 20, 2026", with a section headed "Best Costco Coupon Book Deals (Aug. 24 - Sept. 20)". costcoguides.com now carries an explicit status table listing "September 2026 | August 24 to September 20" and notes "the September book ended on the 20th and the October book picked up the very next day, so there was no gap between them again this cycle". wallethacks.com still lists "Costco Coupon Book: Valid August 28 - September 20". Only the start date is disputed (wallethacks says August 28); the stored August 24 start follows the two sources that agree, and all three agree the last valid day is September 20, 2026.