Certified mail cost breaks into two separate charges. Base postage covers the letter itself, and a flat service fee covers the certified tracking and signature.
Most price confusion comes from people quoting only one of those two numbers. The full certified mail cost is always postage plus the service fee, and often a third fee if return receipt gets added.
Here is the full 2026 breakdown, including every add on that changes the total.
Base certified mail cost
| Item | Price |
|---|---|
| Certified mail service fee | $5.55 |
| First-Class letter postage, 1 oz | $0.82 |
| Total for a standard 1 oz certified letter | $6.37 |
Heavier letters cost more, since First-Class postage adds roughly $0.29 per additional ounce. The $5.55 certified mail service fee itself stays flat regardless of weight.
What return receipt adds
| Return receipt type | Price |
|---|---|
| Mailed green card (PS Form 3811) | $4.65 |
| Electronic (PDF delivered by email) | $2.91 |
Certified mail cost with a mailed return receipt lands around $11.02 for a standard letter. The electronic version brings that total down to about $9.28.
Electronic return receipt costs less and arrives faster, since it skips a physical card traveling back through the mail. Some senders still prefer the green card for a physical file copy. Our full return receipt guide compares both formats in detail.
What restricted delivery and adult signature add
| Extra service | Price |
|---|---|
| Restricted delivery, paired with certified mail | $14.35 |
| Adult signature required | $9.70 |
Restricted delivery limits who is legally allowed to sign for the letter. It is the most expensive add on and gets used mainly for court related mail where the specific recipient matters.
Adult signature required simply raises the minimum age of the signer. Most everyday certified mail does not need either extra service.
A full example with every add on
A 1 ounce certified letter with mailed return receipt and restricted delivery adds up fast. Postage is $0.82, the certified fee is $5.55, return receipt is $4.65, and restricted delivery is $14.35, for a total of $25.37.
That is an extreme case most senders never need. Base certified mail alone, or certified mail plus electronic return receipt, covers the vast majority of legal and business mailings.
Why certified mail costs more than it looks like it should
The $5.55 fee covers a dated receipt, an active tracking number, and a signature captured at delivery. That is meaningfully more infrastructure than a stamp alone provides.
Compare that to registered mail, which involves a locked chain of custody at every handoff and can run well over $20 depending on declared value. Certified mail sits in the middle: more expensive than a stamp, far cheaper than registered mail. Our broader USPS shipping cost guide covers pricing for packages if you are mailing more than a letter.
Our full certified mail guide covers how the service works beyond just the price.
Ways to keep certified mail cost down
Skip return receipt unless you specifically need the signature image later. Basic certified mail tracking already proves delivery happened, just without a copy of the signature itself.
Choose electronic return receipt over the mailed green card when you do need it. The savings are small per letter, but they add up for anyone sending certified mail regularly.
Our guide to sending certified mail walks through the process once you know which add ons you actually need. If you are comparing certified mail against other USPS services for a specific job, the mail class selector can help, and the postage price calculator confirms your base letter rate.
Certified mail cost through third party providers
Online certified mail services and legal mail platforms often charge more than the USPS retail total. Their fee usually covers printing, stuffing envelopes, and handling delivery for you, not just the postage itself.
That markup can be worth it for a business mailing certified letters at volume, since it saves staff time. For a single letter, walking into a post office is almost always the cheaper option.
Compare the all in price before assuming a convenience service saves money. Some charge a flat rate well above the $6.37 USPS baseline for a single 1 ounce letter.
Frequently asked questions
How much does certified mail cost?
The certified mail service fee is $5.55, plus your base postage. A standard 1 ounce letter comes to about $6.37 total.
How much is certified mail with return receipt?
Adding the mailed green card brings the total to about $11.02. The electronic version brings it to about $9.28 instead.
Does certified mail cost more for heavier letters?
The $5.55 certified fee stays flat regardless of weight. Base postage increases with weight the same way it does for any First-Class letter.
Is certified mail cheaper than registered mail?
Yes, significantly. Registered mail involves a locked chain of custody and can run well over $20, while certified mail covers proof of mailing and delivery for a small flat fee.
What is the cheapest way to add proof of delivery to a letter?
Base certified mail without return receipt is the cheapest option that still provides a signature record on file. Skip the extra add ons unless a specific legal situation requires them.
Do certified mail prices change often?
USPS typically adjusts extra service fees once or twice a year alongside broader postage changes. Check current rates before mailing if it has been a while since your last certified letter.
The bottom line
Certified mail cost starts at $6.37 for a standard letter and climbs from there based on which add ons you choose. Return receipt is the most common add on, and the electronic version saves a little over the mailed green card.
Skip restricted delivery and adult signature required unless a specific legal situation calls for them. For most senders, base certified mail plus electronic return receipt covers everything needed.
