Mail-In Coin Grading: The Walkthrough and Cost Math
Affiliate disclosure: we may earn a commission when a reader opens an account through links on this page. The commission has no effect on what you pay or on what we publish. We are not a financial or tax advisor; consult a licensed advisor for your situation. Last reviewed August 2026.
Short on time? The essentials
- Two grading services dominate the United States market: Professional Coin Grading Service (PCGS) and Numismatic Guaranty Company (NGC). Both operate the same basic mail-in model.
- Grading fees are tiered by the coin's declared value. Tier names range across Modern, Economy, Regular or Standard, Express, and Walkthrough at both services.
- Economy-tier fees at both services sit in the low 20 dollar range per coin. Walkthrough tier fees run into the low three digits per coin.
- Turnaround at the Economy tier commonly runs 30 to 60 business days. Walkthrough turnaround runs a handful of business days at a much higher fee.
- Shipping requires a fully insured, tracked carrier method. USPS Registered Mail is the standard for high-value coin shipments because it is the only USPS service that carries formal chain of custody.
- Cleaning is the single most common reason a coin returns as a Details grade instead of a straight numeric grade. Environmental damage and questionable authenticity are the other frequent holds.
- A practical value threshold: do not submit a coin unless the certified sale price at the expected grade beats the raw sale price by at least twice the total cost of grading.
- After grading, coins come back sealed in a labeled plastic holder with a unique certification number that anyone can verify online.
On this page
- What mail-in grading actually is
- The two dominant mail-in services
- The tier system and how declared value drives fee
- Turnaround windows at each tier
- Packaging your coins for shipment
- Insured, tracked shipping in and back
- The mail-in walkthrough step by step
- The cost math on a real submission
- The value-threshold rule of thumb
- Common rejections and Details holders
- What happens after your coins come back
- When mail-in grading is a bad idea
- Mail-in coin grading FAQ
What mail-in grading actually is
Mail-in coin grading is the standard way United States collectors submit coins to a third-party grading service (TPG). You package the coins, insure them, ship them to the grader's facility, and receive them back sealed in labeled plastic holders. Each holder shows a numeric grade on the Sheldon 1 to 70 scale and a unique certification number.
The service authenticates the coin, assigns the grade, and stands behind both. The certified grade sets the coin's market band. A raw coin can trade at a wide range because two buyers may disagree on grade. A certified coin trades in a tighter band because the grade is settled by the service on the label.
Mail-in is the default channel for the vast majority of retail collectors. Coin show submissions and dealer-authorized bulk drops exist, but the same fees, tiers, and rules apply. The only difference is the drop-off location.
The two dominant mail-in services
Two grading services set the terms of the United States market. The Professional Coin Grading Service (PCGS) and Numismatic Guaranty Company (NGC) are named here as the two dominant TPGs by graded volume and market recognition. Both publish public grading standards, both maintain online certification verification tools, and both back their grades with a formal guarantee.
A third service, ANACS, was the American Numismatic Association's original grading arm and remains active in the market. Independent Coin Graders (ICG) also grades coins under a similar model. This page focuses on the mail-in mechanics that the two market leaders share, because their fee schedules and process set the reference every other grader follows.
Nothing on this page endorses one service over the other. The tier names, fee bands, and turnaround windows are similar enough that the decision usually comes down to personal preference, dealer network, and which service's grading holders your buyer prefers.
The tier system and how declared value drives fee
Both dominant services publish a tiered fee schedule. Each tier caps the maximum declared value a coin can carry at that tier. If your coin's fair market value is higher than the tier cap, you must submit at the next tier up. The fee per coin rises with the tier.
The tier names are similar at both services. From cheapest to fastest, the ladder runs Modern, Economy, Regular (PCGS) or Standard (NGC), Express, and Walkthrough. Above Walkthrough, both services offer an uncapped tier for coins worth six figures and up, priced at a base fee plus a percentage of fair market value.
The declared value drives the fee for a reason. The service takes on financial responsibility for the coin while it sits in their vault. A higher declared value means higher insurance risk to the grader, and the tier fee funds that risk transfer.
| Tier | Max declared value per coin | Base fee per coin (USD) |
|---|---|---|
| Economy | $300 or less | $23 |
| Regular | $2,500 or less | $40 |
| Express | $10,000 or less | $70 |
| Walkthrough | $100,000 or less | $150 |
| Rarities | $100,001 or more | $300 base plus 1% of value |
Source: PCGS Services page snapshot captured via web.archive.org (December 2025 crawl of pcgs.com/services). Fees change periodically. Verify current rates on the service's own page before you submit. Checked August 2026.
| Tier | Max declared value per coin | Fee per coin (USD) |
|---|---|---|
| Modern (1965 and later) | $3,000 | $20 |
| Economy (pre-1965 non-gold, most world) | $300 | $25 |
| Standard | $3,000 | $45 |
| Express | $10,000 | $80 |
| WalkThrough | $25,000 | $175 |
| Unlimited WalkThrough | Unlimited | $350 plus 1% of fair market value |
Source: ngccoin.com/submit/services-fees/ (crawled 2026-08-15). Add-on services, gold coin surcharges, and special designations carry additional fees. Verify current rates on the service's own fee page before you submit.
Two notes on how to read these tables. First, both services layer add-on fees for extras such as photography, oversize holders, gold coins, TrueView imaging, or CAC-eligible strike designations. The base tier fee is the floor, not the total. Second, both services require an active paid membership at a modest annual cost before you can submit directly. Membership tiers unlock submission privileges and, at higher levels, a small annual voucher credit.
Turnaround windows at each tier
Turnaround is measured in working days from the day the service opens your box, not the day you drop it in the mail. Faster tiers cost more precisely because the service prioritizes them ahead of the queue.
| Tier | United States coins | World coins |
|---|---|---|
| Express | 15 business days | 15 business days |
| Regular | 35 business days | 35 business days |
| Economy | 45 business days | 60 business days |
| Modern | 30 business days | 30 business days |
Source: PCGS Services page (December 2025 wayback snapshot). PCGS notes these are estimates and turnaround always varies. Business days count from the day the order is entered into the PCGS system.
NGC turnaround runs on a similar band. NGC publishes current turnaround inside its Services and Fees page, and updates the numbers as their queue moves. Both services offer a paid "Fast Track" add-on that roughly halves the turnaround at Economy and Standard tiers.
Add real-world shipping time on both ends. USPS Registered Mail typically moves a coin package in five to ten business days each way. A round-trip Economy-tier submission can easily consume 60 to 90 calendar days from the moment you seal the box until the graded coins land back in your hands.
Packaging your coins for shipment
Both services publish specific packaging rules and both reject submissions that arrive out of spec. The rules are not arbitrary. They protect the coin during handling and let the graders work efficiently once your box hits the vault.
Coins go into non-PVC plastic flips of the correct size. The coin must slide in without force. Do not tape, staple, or glue the flip closed. Label each flip with the submission form number and the coin's line number on the form. Write only on the outside of the flip, never on tape stuck to the coin.
Ship the packaged flips inside a rigid, well-padded outer box. Both services publish a printable submission form that must be included in the box with the coins. Print, sign, and enclose the form. Missing forms slow processing and can trigger a hold on the shipment.
Never send raw coins loose in a bag or in a coin tube for standard grading tiers. Bulk submissions have different packaging rules and different price bands. If you have hundreds of the same coin, ask the service directly about bulk before packing anything.
Insured, tracked shipping in and back
Every service requires insured, tracked shipping. The choice of carrier depends on the declared value of the box.
For high-value shipments, USPS Registered Mail is the standard. Registered Mail is the only United States Postal Service class that carries a formal chain of custody. Every package moves under signature at every transfer point. Insurance is available up to 50,000 dollars per shipment through USPS, and higher through third-party insurers such as Hugh Wood, Collectibles Insurance Services, or Parcel Pro. For higher-value shipments, a broker-arranged private carrier may be required.
For lower-value shipments, USPS Priority Mail with insurance is common. Priority Mail is faster and cheaper but carries less rigorous handling. Add third-party numismatic insurance if the box contents exceed the USPS insurance cap of the carrier used.
Both grading services return your slabbed coins by the same insured, tracked method. You pay return shipping and return insurance as part of the submission. The graders calculate return shipping based on your declared values and add it to your invoice.
The mail-in walkthrough step by step
The overall mail-in process is the same at both dominant services. Some tiers, add-ons, and forms differ, but the flow below applies at either grader.
- Choose the right tier for each coin. Assign each coin a realistic declared value at the grade you expect it to earn. Match the coin to the lowest tier whose maximum value cap covers your declared value. Submitting under a tier's value cap causes the service to bump the coin up and charge you the higher tier automatically.
- Join the service and get a submission number. Both services require an active paid membership. Membership plans include a small annual voucher credit and give you access to the online submission portal.
- Fill out the printable submission form. List every coin on one line: series, date, mint mark, tier, declared value, and any variety attribution. The form doubles as the packing list and the invoice basis.
- Package the coins per the service's rules. Non-PVC plastic flips, one coin per flip, no tape or staples on the flip. Label each flip with the submission form number and the coin's line number.
- Pack the flips in a rigid, padded outer box. Include the printed submission form. Do not include cash, checks, or unrelated items. Payment is handled online after grading is complete.
- Ship insured and tracked. USPS Registered Mail is the standard for high-value shipments. Priority Mail with insurance suits lower-value groups. Match the insurance to the total declared value of the box.
- Wait out the queue. The service logs your box in, verifies contents against your form, grades the coins, encapsulates them, and invoices you for grading plus return shipping and return insurance.
- Pay the invoice and receive the return shipment. Return shipping uses the same insured method. Track the box, sign for it, and open it on camera if the contents are high value.
- Verify each certification number online. Both services publish a free certificate verification lookup. Match every returned slab against the service's database to confirm the label matches the online record.
The cost math on a real submission
Fees look modest per coin. The real cost of a submission includes shipping and insurance both ways, the membership fee amortized across the submission, and the opportunity cost of coins tied up in the grader's queue for weeks.
Two structural fixes push the math in your favor. First, triage aggressively before packing. Cull anything that will not obviously beat the fee-plus-shipping floor at its expected grade. Second, if you have 30 or more coins, ask each service directly about bulk pricing. Bulk tiers apply to volume submissions of similar coins and can cut the per-coin fee sharply.
The value-threshold rule of thumb
A useful rule of thumb keeps most submitters honest. Do not submit a coin to the mail-in queue unless the certified sale price at the expected grade beats the raw sale price by at least twice the total cost of grading that coin.
Take the coin's Economy-tier all-in cost (fee plus a fair share of shipping and insurance, call it 40 dollars). Multiply by 2 to get 80 dollars. If the certified market price at the grade you expect is not at least 80 dollars above what you could sell the coin for raw today, sell it raw.
The 2x buffer exists because grade outcomes are uncertain. A coin you think will grade MS-64 may come back MS-63, and the price band collapses. The 2x rule gives you room for a one-point downside without turning the submission into a net loss. On very high-value material, the buffer can shrink, but the principle is the same: only grade coins where the numeric grade unlocks real price the market will pay for you.
Common rejections and Details holders
A submission does not always come back with a straight numeric grade. Both services can return a coin in a Details holder, meaning they authenticated the coin but declined to assign a numeric grade because of a specific problem. Details coins still trade in the market, but at a large discount to a straight-graded example of the same wear level.
The most common reasons for a Details holder are the same at both services. Knowing them before you submit is the fastest way to protect yourself from expensive surprises.
Cleaning
Cleaning is the single most common cause of a Details grade. Any polishing, dipping, wiping, or rubbing removes original surface and mint luster that graders look for. A crusty original coin outsells a scrubbed coin of similar wear almost every time. Never clean a coin before submitting.
Environmental damage
Corrosion, active verdigris, PVC film residue from old flips, and heavy toning spots all count as environmental damage. Storage matters. Coins stored in loose bags, cardboard albums with sulfur, or PVC-based plastic flips often develop surface issues that force a Details grade later.
Questionable authenticity holds
Suspected counterfeits, altered dates, added mint marks, and coins that fail metallurgical checks come back either as Details for authenticity concerns or, in clear cases, as returned uncertified with a note. Both services publish counterfeit warnings and both maintain internal databases of known fake dies. Coins struck at heavily counterfeited dates and mints receive extra scrutiny by default.
Damage from post-mint tampering
Rim damage from a coin sorter, scratches from being carried loose in a pocket, ring test marks, and drill holes are all disqualifying. Post-mint damage does not always mean total loss (a lightly damaged key date is still a key date) but the numeric grade will not appear on the label.
Cleaning masked as toning
Artificial toning is a specific rejection at both services. Coins that were dipped and then chemically retoned, often to hide surface cleaning, are usually caught by experienced graders. The result is a Details label naming the artificial surface treatment.
What happens after your coins come back
Graded coins arrive in tamper-evident plastic holders (slabs). Every holder prints the coin description, the date and mint mark, the Sheldon grade, a unique certification number, and a barcode that encodes the same number.
Your first step is to verify each slab online. Both services publish free certification lookup pages. Enter the certification number and confirm the record matches the label: series, date, mint mark, and grade. This step catches counterfeit slabs and mislabeled encapsulations.
Storage is the next decision. Slabs stack well in dedicated coin storage boxes made from inert materials. Keep them in a climate-controlled space, out of direct sunlight, away from heat vents. A safe or safe-deposit box is standard for high-value slabs.
Insurance is worth reviewing. A homeowners policy usually caps coin coverage at a low four-figure amount. A rider or a specialty numismatic policy through a broker such as Hugh Wood or Collectibles Insurance Services can insure a certified collection at agreed value.
Resale is the final leg. Certified coins sell at auction (Heritage, Stack's Bowers, GreatCollections), at retail through certified-coin dealers, or directly to collectors on major marketplaces. The certification number and the grade set the market band. Two identical coins in the same grade often sell within a tight percentage of each other because the label removes buyer uncertainty.
When mail-in grading is a bad idea
Mail-in grading is a tool with real costs. On the wrong material or in the wrong situation, submitting is a straight loss. The list below is when to walk away instead.
The coin is common and circulated. Common-date Morgan dollars, Buffalo nickels, and wheat cents in circulated grades almost always sell raw for less than the grading fee. There is no numeric grade at which the certified price beats the raw price plus the fee.
The coin has been cleaned. If you cleaned the coin, or if a prior owner cleaned it, the almost certain outcome is a Details holder. You will pay the full grading fee to receive a label that lowers the coin's value against a straight-graded comparable.
You need cash fast. Economy-tier round-trip runs 60 to 90 calendar days from ship-out to receipt. Walkthrough tier is faster but carries a triple-digit per-coin fee. If you need liquidity within weeks, sell raw to a local dealer or on a major auction site instead.
The coin's value is uncertain and you have no baseline. Submit blind and you may pay 30 dollars per coin to learn that half your box was worth 8 dollars each. Get a free grading opinion from a reputable dealer or a knowledgeable collector on photographs before you spend anything on tier fees.
The coin is bullion for melt value. Modern American Silver Eagles, generic silver rounds, and bullion bars have no numismatic uplift from grading. The price is set by silver content and current spot. Skip grading entirely.
The submitted group is too small to justify shipping and insurance. A single 40 dollar coin submission carries the full shipping and insurance overhead. Group at least 8 to 12 coins into one shipment, or wait to accumulate a batch.
You expect grading to rescue value from a damaged coin. A holed, drilled, or heavily scratched coin will come back in a Details holder or uncertified. Grading does not clean up post-mint damage.
Mail-in coin grading FAQ
How much does mail-in coin grading cost per coin?
Base fees start in the low 20 dollar range per coin at the Economy tier and rise with the tier. Regular or Standard sits in the 40 to 45 dollar band, Express near 70 to 80 dollars, and Walkthrough at 150 to 175 dollars per coin. Add shipping and insurance both ways, plus an annual membership fee amortized across your submissions.
Do PCGS and NGC charge the same fees?
No, and the fees change periodically. As of August 2026, PCGS Economy sits at 23 dollars per coin and NGC Economy sits at 25 dollars per coin. Standard-tier and higher fees are also in the same general band. Verify current fees on the service's own page before you submit; both services publish a live fee schedule.
Which tier should I pick for a coin worth 500 dollars?
Most services cap Economy at 300 dollars per coin fair market value. A coin declared at 500 dollars must be submitted at the next tier up (Regular at PCGS, Standard at NGC), typically in the 40 to 45 dollar per coin band. Submitting under-tier causes the service to bump the tier and charge you the higher fee automatically.
How do I ship coins safely to the grader?
USPS Registered Mail is the standard for high-value shipments because it carries formal chain of custody at every transfer. USPS caps insurance at 50,000 dollars per shipment through Registered Mail. For higher-value shipments, use a specialty numismatic insurer or an armored carrier arranged through a broker.
How long does mail-in coin grading take?
Economy tier commonly returns in 30 to 60 business days at both services. Standard or Regular sits near 15 to 35 business days. Express runs near 15 business days. Walkthrough returns in a handful of business days at a much higher per-coin fee. Add real shipping time on both ends of five to ten business days each way.
What is a Details grade?
A Details grade is a certification that authenticates the coin but declines to assign a numeric grade because of a specific problem. Common Details labels include Cleaned, Environmental Damage, Scratched, Tooled, or Genuine Authenticity Unverified. Details coins trade at a large discount to straight-graded examples of similar wear.
Do I have to be a paid member to submit?
Yes. Both dominant services require an active paid membership before you can submit directly. Membership plans include a modest annual credit and unlock the online submission portal. Non-members can submit indirectly through authorized dealers who add a handling fee on top of the tier fee.
Is it worth grading an inherited coin collection?
Sometimes. Triage the collection first. Common circulated material almost always sells raw for less than the grading fee. Uncirculated coins of scarce dates, obvious mint errors, and any coin that photographs as high-grade with strong luster usually pays back grading many times over at sale. Group the winners into one submission and sell the rest raw.
Sources
- Numismatic Guaranty Company (NGC). NGC Grading and Conservation Services and Fees. Full tier structure (Modern, Economy, Standard, Express, WalkThrough, Unlimited WalkThrough), max declared value per tier, and per-coin fees. Add-on service list. ngccoin.com/submit/services-fees. Checked August 2026.
- Numismatic Guaranty Company (NGC). How to Package Coins for Submission. Non-PVC plastic flip requirement, one coin per flip rule, prohibition on tape/staples/glue, and holder-size guidelines (Standard, Double Thick, Oversize). ngccoin.com/submit/how-to-package. Checked August 2026.
- Numismatic Guaranty Company (NGC). NGC Grading Process and Grading Scale. Grading workflow inside the vault and the 70-point Sheldon-based grade ladder each coin is placed on. ngccoin.com/coin-grading/grading-process. Checked August 2026.
- Professional Coin Grading Service (PCGS). PCGS Services. Tier snapshot (Economy $23, Regular $40, Express $70, Walkthrough $150, Rarities $300 plus 1%), max declared value bands per tier, and published turnaround estimates by tier. Snapshot captured via web.archive.org December 2025 crawl of pcgs.com/services because the live page blocks non-browser fetches. web.archive.org/web/2025/https://www.pcgs.com/services. Checked August 2026.
- United States Postal Service (USPS). Registered Mail. Chain-of-custody handling, insurance available up to 50,000 dollars per Registered Mail shipment, signature requirement at every transfer. usps.com/international/registered-mail.htm. Checked August 2026.
- United States Mint. Report Suspected Counterfeit. Official mint guidance on counterfeit United States coins, feeding the counterfeit-flag databases the grading services maintain. usmint.gov/learn/collecting-basics/counterfeit-coins. Checked August 2026.
- American Numismatic Association (ANA). Official ANA Grading Standards for United States Coins. The reference standard on which the modern Sheldon scale is built and against which most third-party grading services benchmark their in-house standards. money.org. Checked August 2026.