The short answer: couples who married in 2025 spent an average of $4,600 on an engagement ring, according to The Knot 2026 Real Weddings Study. That is down from $5,200 a year earlier. The main reason is the switch to lab-grown diamonds, which now appear in 61% of engagement rings.
This guide covers what the numbers mean, how lab-grown and natural stones compare in price, where the "three months' salary" rule came from, how the GIA 4Cs drive price, and what to sort out after you buy: grading paperwork, an appraisal, insurance, and how to avoid expensive financing. It is general information, not financial advice.
The ring sits outside the wedding budget in most surveys. For the wedding itself, see how much a wedding costs in 2026 and where to splurge and where to save.
Average engagement ring cost: the latest numbers
The Knot publishes ring data in two places. Its Real Weddings Study runs every year. Its Jewelry & Engagement Study is a separate survey focused on proposals and rings. The most recent edition we could find on The Knot's site is the 2024 one, so the newer ring figures come from the Real Weddings Study.
| Source | Who was surveyed | Average ring spend | Lab-grown share | Average carat |
|---|---|---|---|---|
| The Knot 2026 Real Weddings Study | 10,474 US couples married in 2025 | $4,600 | 61% | 1.9 ct |
| The Knot 2025 Real Weddings Study | 16,956 US couples married in 2024 | $5,200 | 52% | 1.7 ct |
| The Knot 2024 Jewelry & Engagement Study | survey respondents (sample size not stated on the page) | $5,200 | — | — |
The trend runs one way. The Knot reports averages of $6,000 in 2021, $5,800 in 2022, $5,500 in 2023, $5,200 in 2024 and $4,600 in 2025. Over the same period the average stone got bigger: 1.5 carats in 2021, 1.7 in 2024 and 1.9 in 2025. Couples are buying larger stones for less money, and lab-grown diamonds explain most of that.
The average hides a wide spread
An average is pulled up by a minority of expensive rings. The Knot 2024 Jewelry & Engagement Study gives a better feel for the range:
- 64% of respondents spent less than $6,000;
- 33% spent less than $3,000;
- 8% spent between $10,000 and $14,999.
So a $2,500 ring is not unusual, and neither is a $9,000 one. Neither is "wrong".
Lab-grown vs natural: share and price
The 2026 Real Weddings Study splits ring buyers by stone type:
| Lab-grown center stone | Natural center stone | |
|---|---|---|
| Average cost | $4,300 | $7,000 |
| Average carat | 2.0 ct | 1.6 ct |
| Most popular shape | oval | round |
| Solitaire setting | 40% | 41% |
Lab-grown stones accounted for 61% of engagement ring purchases, which The Knot calls a 239% increase since 2020. It crossed 50% for the first time among couples married in 2024 (52%). In the 2026 study, 40% of couples said it was specifically important to them that the stone be lab-grown.
The price gap per carat is bigger than the table suggests. The average lab-grown ring cost about 39% less than the average natural ring while carrying a stone about 25% heavier.
Disclosure rules. Lab-grown and natural diamonds can look the same to the eye, so paperwork matters. The FTC's Jewelry Guides (16 CFR Part 23) allow a seller to call a lab-made diamond "cultured" only with a clear disclosure such as "laboratory-created", "laboratory-grown" or "[manufacturer name]-created", conveying that it is not a mined stone (§ 23.12(c)(3)). Make sure your receipt and grading report say which one you bought.
Grading changed for lab-grown stones. GIA, which created the 4Cs scales, said it would no longer use the grading terms created for natural diamonds on lab-grown stones. Since its revised lab-grown service launched on October 1, 2025, GIA classes lab-grown stones of 0.15 ct and up as "Premium" or "Standard", based on an overall look at color, clarity and cut; stones below the Standard minimums get no GIA assessment. Other labs may grade differently, so compare reports from the same lab when you compare prices.
Resale. Don't count on getting your money back on any diamond. Edward Jay Epstein's 1982 investigation in The Atlantic already described big losses for people who bought at retail and tried to sell. The Knot presents lab-grown stones as a way to stretch a ring budget. Buy the ring you want to wear, not as an investment.
Where the "three months' salary" rule came from
It came from advertising. In September 1938, Harry Oppenheimer of De Beers met the president of the N. W. Ayer agency in New York to plan a campaign that would build demand for diamonds in the US. The Atlantic's 1982 account of that campaign shows how deliberately it was planned: an Ayer copywriter came up with "A Diamond Is Forever", and within a year it became De Beers' official motto.
The salary benchmark came out of the same marketing. Al Jazeera's 2025 history of the diamond ring notes that De Beers ads first suggested one month's salary, and by the 1980s asked, "How can you make two months' salary last forever?" The Knot says the figure later grew to three months' salary, tells readers to disregard the rule and calls it "just marketing".
A better way to set a number:
- Start from what you have saved, not from income.
- Check it against your other near-term goals: the wedding, an emergency fund, debt payoff, a home.
- Decide which of the 4Cs matters most and spend there (see below).
If you're saving toward the ring or the wedding, the monthly savings calculator turns a target and a date into a monthly amount.
The 4Cs: what drives the price
GIA's 4Cs are the standard language for diamond quality.
- Carat is weight, not size. A metric carat is 200 milligrams, split into 100 points. GIA calls 1.00, 1.50 and 2.00 ct "magic sizes". A 0.99 ct and a 1.00 ct stone are hard to tell apart, but the price difference can be significant. Buying just under a round number is a common way to save.
- Color is graded on GIA's D-to-Z scale, from D (colorless) to Z (light yellow, brown or gray).
- Clarity has 11 grades in 6 categories, from Flawless (FL) and Internally Flawless (IF) through VVS1–VVS2, VS1–VS2 and SI1–SI2 to I1–I3, judged under 10x magnification.
- Cut grades run from Excellent to Poor, and GIA gives them only to standard round brilliant diamonds. For ovals, emeralds and other fancy shapes, look at proportions and how the stone looks in person.
The Knot's ring buyers ranked cut/shape first, style/setting second and metal third. The metal matters for budget too. Platinum costs more than gold. GIA says white gold is usually rhodium-plated, and the plating wears away and needs redoing from time to time.
How couples shop: timing and who's involved
From The Knot 2026 Real Weddings Study:
- 57% of proposers start looking more than six months before the proposal;
- 63% buy the ring within two months of proposing;
- 79% of recipients take part in choosing the ring;
- 64% buy in person, about a third online;
- proposers visit two retailers and look at 10 rings in person on average;
- yellow gold (39%) keeps gaining, while white gold keeps declining.
Wedding bands are a separate purchase. Estimate them with the wedding rings cost calculator.
After you buy: appraisal and insurance
A standard homeowners policy may cover jewelry for perils like fire and theft. But theft of jewelry is usually subject to a low sublimit. The South Carolina Department of Insurance puts it at "generally about $1,500". A $4,600 ring can be underinsured from day one.
The two common fixes, according to the same regulator:
- Raise the sublimit. This is cheaper, but per-item and total caps remain.
- Schedule the ring on a floater. This costs more but gives the broadest protection, including accidental losses a homeowners policy may exclude, like a ring dropped down a drain. Items must be professionally appraised before you buy a floater.
Keep the receipt, the grading report and the appraisal together, plus a few clear photos. Re-check the appraisal from time to time, since what it costs to replace the ring can change. For the rest of the first month after the proposal, see just got engaged: what to do first.
One more piece of paperwork: a very expensive ring can matter for federal gift tax. A ring over the 2026 annual exclusion ($19,000) given to a fiancé(e) generally means the giver files Form 709. See wedding gifts and IRS gift tax rules.
Financing: read the promotion before you sign
In the same article that reports its 2024 Jewelry & Engagement Study figures, The Knot says its study found that one in three proposers who bought a new ring took on some kind of debt, through credit cards, loans or borrowing from friends or family. About one in four paid from savings, including long-term investments.
If a jeweler offers "no interest if paid in full in 12 months", find out whether it is deferred interest or a true 0% APR. The Consumer Financial Protection Bureau explains the difference this way: with deferred interest, if you don't pay off the whole promotional balance in time, you are charged interest back to the purchase date. With a true 0% promotion, interest starts only on the balance left when the promotion ends.
The CFPB's example: a $400 purchase at a 25% rate, $25 a month for 12 months. Under a true 0% promotion you'd still owe $100 at the end. Under deferred interest you'd owe about $165, because about $65 of interest accrued all year and gets added back. Scale that up to a $4,600 ring and the cost of missing the deadline gets serious.
Practical rules:
- Divide the price by the number of promotional months, and pay at least that much each month, not the minimum.
- Put the promotion end date in your calendar.
- Assume any buy-now-pay-later plan is a loan and read its late-fee terms.
FAQ
What is the average engagement ring cost in 2026?
The most recent figure is $4,600, from The Knot 2026 Real Weddings Study (couples married in 2025). The most recent edition of The Knot's dedicated Jewelry & Engagement Study (2024) reported $5,200.
How much cheaper is a lab-grown diamond ring?
In The Knot's 2026 data, the average lab-grown ring cost $4,300 with a 2.0 ct stone, and the average natural ring cost $7,000 with a 1.6 ct stone. That is about 39% less money for about 25% more carat weight.
Should I spend three months' salary on an engagement ring?
No rule says so. The idea grew out of De Beers advertising, which first suggested one month's salary and later two. The Knot tells readers to ignore it. Set a budget from savings and your other goals.
Does homeowners insurance cover an engagement ring?
Often only up to a jewelry theft sublimit, which one state regulator puts at about $1,500. Scheduling the ring on a floater, which requires an appraisal, gives broader coverage.
Sources
- The Knot, Real Weddings Study: 2026 Data Read-Out (page and PDF; 10,474 US couples married Jan 1–Dec 31, 2025): https://www.theknot.com/content/wedding-data-insights/real-weddings-study and https://images.theknot.com/rules/2026/the-knot-real-weddings-study-data-read-out-2026.pdf
- The Knot, Weddings in 2024 (2025 Real Weddings Study; 16,956 couples): https://www.theknot.com/content/wedding-data-insights/weddings-in-2024
- The Knot, average engagement ring cost (2024 Jewelry & Engagement Study, three months' salary rule), updated Jan 9, 2025: https://www.theknot.com/content/how-much-to-spend-on-engagement-ring
- Rapaport, "Lab-Grown 'Taking Over' Engagement-Ring Spending – The Knot" (Feb 19, 2026): https://rapaport.com/news/lab-grown-taking-over-engagement-ring-spending-the-knot/
- Edward Jay Epstein, "Have You Ever Tried to Sell a Diamond?", The Atlantic, February 1982: https://www.theatlantic.com/magazine/archive/1982/02/have-you-ever-tried-to-sell-a-diamond/304575/
- Al Jazeera, "How the diamond engagement ring was invented – and sold around the world" (Sept 14, 2025): https://www.aljazeera.com/features/2025/9/14/how-the-diamond-engagement-ring-was-invented-and-sold-around-the-world
- GIA 4Cs: carat weight https://4cs.gia.edu/en-us/diamond-carat-weight/ ; color https://4cs.gia.edu/en-us/diamond-color/ ; clarity https://4cs.gia.edu/en-us/diamond-clarity/ ; cut https://4cs.gia.edu/en-us/diamond-cut/
- GIA, White Metal Options for Your Engagement Ring: https://4cs.gia.edu/en-us/blog/pick-right-white-metal-engagement-wedding-ring/
- GIA, "Updated Laboratory-Grown Diamond Services to Launch October 1" (press release, Aug 26, 2025): https://www.gia.edu/gia-news-press/updated-laboratory-grown-diamond-services-to-launch-october-1
- National Jeweler, "GIA's new quality assessment for lab-grown diamonds is coming" (Aug 28, 2025): https://nationaljeweler.com/articles/14226-gia-s-new-quality-assessment-for-lab-grown-diamonds-is-coming
- FTC Guides for the Jewelry, Precious Metals, and Pewter Industries, 16 CFR 23.12 and 23.25 (eCFR): https://www.ecfr.gov/current/title-16/chapter-I/subchapter-B/part-23
- South Carolina Department of Insurance, Insurance for Expensive Gift Items: https://www.doi.sc.gov/996/Insurance-for-Expensive-Gift-Items
- IRS, Frequently asked questions on gift taxes (2026 annual exclusion $19,000): https://www.irs.gov/businesses/small-businesses-self-employed/frequently-asked-questions-on-gift-taxes
- CFPB, How to understand special promotional financing offers on credit cards (archived blog): https://www.consumerfinance.gov/archive/blog/how-understand-special-promotional-financing-offers-credit-cards/