How to Pay Import Customs Duty Online in the U.S.: Carrier, CBP, and USPS Options

Yes — import customs duty can often be paid online, but how you pay depends on who is handling the shipment and whether the bill is coming from the carrier or directly from U.S. Customs and Border Protection (CBP). In practice, the importer is ultimately responsible for the duty owed on an import, so the first step is to identify the payment route before you try to pay. For a useful background check on whether duties apply at all, see see when customs duties apply.

This guide is about the practical payment methods for U.S. import customs duty — not a duty-rate calculator. The correct route may be a carrier portal, a prepaid shipping option, or an electronic payment method accepted by CBP.

Who pays import duty, and how do you pay it online?

The importer is responsible for paying any duty owed on an import. How you pay depends on how the goods were shipped and which party is handling customs clearance. In simple terms, there are three common paths:

• Carrier-billed payment — the courier such as UPS or FedEx invoices you and gives you an online payment link or portal.
• CBP electronic payment — the duty, taxes, or fees are paid directly through an authorised customs payment route such as Pay.gov / ACH, where applicable.
• Prepaid shipment option — duties are collected in advance at the time of shipping, which is common with certain USPS international services.

The safest approach is to identify the carrier or customs channel first, then use the matching payment path. A carrier invoice is not the same thing as a CBP customs bill, and a prepaid duty option is not the same thing as paying after delivery.

How to pay UPS import fees online

If UPS is handling your shipment, the usual online route is through UPS tracking. UPS says the best way to pay import fees is online before delivery: start by tracking the parcel on UPS.com, and if a yellow banner appears, use the Pay Now link. That makes this a carrier-specific workflow, not a public CBP checkout page. You are paying the UPS import fee request attached to that shipment.

If you are unsure what is due, rely on the UPS tracking page or invoice rather than assuming the wording on the customs notice tells you the payment method. The carrier will usually show the amount, reference number, and available payment options on its own site.

If UPS fees are not paid, the shipment may be delayed or held until the outstanding amount is settled. In other words, do not assume delivery will proceed as normal if the carrier invoice remains unpaid.

For related delivery and status issues, our guide on track your shipment and delivery status may help if the parcel appears stuck in transit.

How USPS prepaid import duties work

USPS offers a different model: Delivered Duty Paid (DDP) for eligible shipments and destination countries. With this option, USPS can automatically calculate import duties, taxes, and fees when you ship certain items using Click-N-Ship or other eligible USPS shipping tools, and you can choose to prepay those costs.

This is important because USPS DDP is usually a shipper-side prepayment workflow, not a post-delivery customs bill. In other words, the sender may prepay the charges at the time of booking the shipment rather than the recipient paying a separate customs invoice later.

USPS also limits this option to certain items and destination countries, so it is not a universal “pay later online” solution for every parcel. If you are shipping through USPS and want to know whether you can pay customs fees online before dispatch, check whether the shipment qualifies for the prepaid import duties flow.

How FedEx import duty payment works online

FedEx provides the FedEx Import Tool (FiT) for paying duties and taxes securely online and managing the customs clearance process for international shipments. This is the FedEx-specific online route for import duty payment and clearance management.

As with UPS, the key point is that the carrier handles the payment workflow. If FedEx is carrying the shipment, you should use the tools and instructions in the FedEx account or shipment notice rather than trying to pay through a generic customs page. The tool is designed for duties and taxes tied to the shipment, and it can also support the clearance process.

For many courier shipments, the carrier may pay the duty upfront on your behalf and then invoice you for reimbursement. That means the online payment step may happen through the courier’s own portal, not directly through CBP.

How to pay U.S. customs duty electronically through CBP

For some import payments, CBP accepts electronic payment methods through official customs payment systems. CBP’s payment guidance shows that duties, taxes, fees, and other charges can be paid electronically through routes such as Pay.gov / ACH Debit and ACH Credit where applicable. CBP also lists approved electronic payment methods for certain customs charges on its payment pages.

This route is most relevant when you, your broker, or your business is dealing directly with CBP rather than paying a courier invoice. It is not the same as paying a carrier’s service bill on a shipping website. ACH-based customs payments generally require the proper account set-up or authorisation, so they are more common in commercial or established importer workflows than in one-off consumer parcel situations.

For official background on CBP’s electronic payment methods, see the agency’s guidance on acceptable electronic payment methods. If you are importing commercially and handling customs directly, this is the route to understand.

If you import regularly, how brokers and ACH payments work

Regular importers often use a customs broker or freight forwarder to manage duty payment. In that model, the broker pays CBP on your behalf and then invoices you. This is a common business workflow because it keeps clearance moving and reduces the chance of missed deadlines or account issues.

Commercial importers may also use ACH Debit or ACH Credit. With ACH Debit, CBP pulls the funds from a designated account; with ACH Credit, the importer initiates the transfer to CBP. These are electronic payment methods, but they are not the same as clicking a card-payment button on a carrier invoice. They also usually require the right importer setup and payment authorisation.

If you import regularly, it is worth understanding the customs-bond side of the process as well, because bond requirements can affect how the shipment is cleared and how payment is handled. See our guide to understand customs bond requirements.

How to estimate import duty before you pay

A duty calculator can help you estimate charges, but it does not replace the actual customs assessment. The duty amount depends on the product’s HTS classification and the declared value of the goods. That means you need the correct HTS or HS code and the commercial invoice value before you can get a reliable estimate.

Many importers also forget that duty is only one part of the landed cost. Freight, brokerage, and carrier administrative fees may be separate from the customs duty itself. So if you are using a calculator, use it as an estimate tool, not as a final payment figure.

Helpful tools can make the estimate process easier. For example, tariff simulators and duty guides can help you identify likely charges and the role of HTS classification. A practical next step is to check the product classification and invoice value before you pay anything.

What you need	Why it matters	What it does not replace
HTS/HS classification	Determines the applicable duty rate	Official customs assessment
Declared value / commercial invoice	Used to calculate duty amount	Carrier invoice or customs bill
Freight and brokerage charges	Affect total landed cost	Actual duty calculation

For more on estimating charges before payment, you can also consult a duty guide such as import customs duties and rates guidance or an estimating tool like Flexport’s tariff simulator. These tools help you estimate; they do not create the actual customs obligation.

Carrier invoice payment versus customs authority payment

One of the biggest sources of confusion is mixing up carrier billing with customs payment. They are related, but they are not the same thing.

• Carrier invoice payment means the courier bills you for import fees, taxes, or administrative charges and gives you a payment method through its own system.
• Customs authority payment means you or your broker pays CBP through an approved electronic customs payment method.
• Prepaid duty means the charges are collected before the parcel is shipped or released under a prepaid service.

If you see a tracking page, carrier email, or delivery notice, read it carefully before paying. The payment page should tell you whether the bill belongs to the carrier, the customs authority, or the sender’s prepaid shipping arrangement.

One-off consumer shipments versus commercial importer workflows

For one-off consumer imports, the most common online payment route is usually through the carrier — especially UPS or FedEx — because the courier has already handled the shipment and the fee arrives as a shipment-specific invoice. USPS may also allow prepaid duty collection on eligible shipments when the parcel is created.

For commercial importers, the workflow is often more formal. The importer may use a broker, pay CBP electronically through ACH, or manage recurring payments through a customs account structure. That setup is more suitable for businesses importing regularly, not just for a single parcel bought online.

So if you are asking, “Can I pay custom duties online?” the answer is yes — but the correct answer depends on whether your shipment is moving through a courier invoice, a USPS prepaid service, or a direct CBP payment channel.

What to do if you are unsure which payment route applies

If you are not sure where to pay, work through this simple decision tree:

1. Check the carrier or shipping method — UPS, FedEx, USPS, or a broker-managed commercial entry.
2. Read the tracking page, invoice, or customs notice — this usually tells you whether payment is due to the carrier or to CBP.
3. Confirm whether the duty was prepaid — if the shipment used a DDP-style service, payment may already have been collected.
4. Use the matching payment route — carrier portal, CBP electronic payment method, or prepaid shipment workflow.

If you are still unsure whether the parcel should have been subject to duty in the first place, our article on see when customs duties apply can help you verify the threshold and next steps.

Can custom duty be paid online?

Yes. In many cases, customs duty can be paid online — but not always through the same website or the same payment method. UPS, FedEx, USPS prepaid options, and CBP electronic payment routes all serve different shipment situations.

The key is not to search for a single universal checkout page. Instead, identify the shipment channel first, then pay through the correct system. That approach avoids delays, duplicate payments, and confusion about whether you are settling a carrier invoice or a customs obligation.

After payment: what if you paid too much?

If you believe you overpaid customs duty, the next step is to review the shipment details, invoice, and classification used for the entry. In some cases, overpayment can be corrected through a refund process, depending on the facts and the customs record.

If that applies to you, see our guide on request a customs duty refund for the next steps after payment.

In short: yes, you can often pay import customs duty online in the U.S., but the method depends on whether the shipment is billed by a carrier, handled through USPS prepaid duties, or paid directly through CBP’s electronic systems. Start with the shipping channel, then follow the matching payment route.