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USPS

USPS rates, regulations, and services for business mailers. Covers First-Class, Certified Mail, EDDM, and tracking options with 2026 pricing.

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ARTICLES

Editorial illustration of a certified envelope moving through ordinary mail while USPS acceptance, delivery-attempt, and outcome records accumulate beside it.

CERTIFIED MAIL ·

How Does Certified Mail Work? The Life of a Letter

Certified Mail doesn't change how your letter travels — it builds a record around the trip. The whole system, stage by stage: what USPS writes down, who can sign, and what you can prove at each point.

Loose envelopes, a red three-slot sorter and neatly banded letter stacks on a navy surface.

FIRST-CLASS MAIL ·

Commercial First-Class Mail Rates: Presort Costs and Eligibility

First-Class Presort can reduce postage on a qualifying mailing. Compare current letter rates, preparation requirements and applicable fees before deciding whether the complete mailing costs less.

Diagram showing that First-Class Mail has four prices rather than one — stamped letter, metered letter, postcard, and large envelope — with format determining the price before weight.

FIRST-CLASS MAIL ·

First-Class Mail Rates 2026: Stamp & Letter Prices

A qualifying 1 oz domestic letter costs $0.82 stamped or $0.78 metered. Compare common postage prices, then check complete domestic and international rate tables.

Editorial illustration of envelopes, a red letter sorter and bundled correspondence.

FIRST-CLASS MAIL ·

Can You Track First-Class Mail? Know Your Options

A regular First-Class letter has no tracking number. Here's how to get one with Certified Mail or Priority Mail, how to add a signature, and what each costs.

A narrow cream envelope overlaps a larger navy document envelope beside red measurement brackets and a ruler.

FIRST-CLASS MAIL ·

First-Class Mail Size and Weight Limits for Letters and Large Envelopes

Which business envelopes mail as letters, how many pages fit in one ounce, and what pushes an envelope into a surcharge or package prices.

Envelope on a desk beside an analog clock and mail tray.

FIRST-CLASS MAIL ·

First-Class Mail Delivery Time: How Long a Letter Takes

USPS delivers First-Class Mail in 1–5 days. Get the expected delivery day for your two ZIP codes, learn how USPS counts the days, and plan a letter that has a deadline.

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