Continuous vs Single-Entry Customs Bonds: Sizing and Cost

The email from CBP's Revenue Division arrives on a Tuesday, addressed to the importer and its surety, and says the continuous bond on file is insufficient. It goes to a shared trade-compliance inbox. Fifteen days later the broker cannot file entries against the old bond without extra security, three containers sit at the terminal earning demurrage, and the controller learns about the bond for the first time from a broker invoice for single transaction bond premiums.

Bond sizing is arithmetic that finance can own. CBP publishes the formula, the rounding steps and the arrears that inflate it; India publishes the triple-duty rule for warehoused goods and, since February 2025, an all-India electronic bond. A monthly headroom check against those rules turns an insufficiency notice from an emergency into a scheduled filing.

• What this guide covers: what a US import bond guarantees, single transaction bond amounts, the reviewer and analytical formulas, the cost break-even between the two bond types, insufficiency notices, effective and termination dates, and India's Section 59 and electronic bonds.
• What it adds: a worked bond calculation in dollars and rupees, a sizing formula you can drop into a spreadsheet, a missed-notice timeline, and a checklist for controllers who renew bonds each year.

What a CBP Form 301 bond actually guarantees on an import entry

An import bond is a contract in which the importer, as principal, and a surety jointly promise CBP that duties, taxes and charges will be paid and that entry obligations will be met. Under 19 CFR 113.62 the basic importation and entry conditions cover depositing estimated duties on time, paying any later increase CBP finds due, completing entry, producing missing documents and redelivering goods when demanded.

• Single transaction bond: the same conditions secure one entry, and the Revenue Division or the port director approves it.
• Continuous bond: the conditions secure every entry the principal files while the bond is in force, approved by the Revenue Division.
• One per activity: Section 113.12(b) allows only one continuous bond per activity for each principal, identified by its 11-digit number under CBP's 2024 guide.

Because the bond touches tax, treasury and operations, ownership tends to blur. The table assigns each record to one owner and one approver, which is the first fix when notices go unanswered.

Single transaction bonds: entered value plus duties, or three times value

A single transaction bond for a consumption entry is generally set at no less than the total entered value plus all duties, taxes and fees. That floor is why one-off bonds look expensive: the surety is underwriting the cargo's value, not just the duty. CBP's 2024 guide sets three main departures from the general rule, each keyed to the kind of goods on the entry.

• Unconditionally duty-free goods: the bond may equal 10% of total entered value, unless another special category applies.
• Restricted merchandise: the bond must equal three times the value of the restricted goods and never less than $100; the guide's Appendix A lists the classes, such as goods under other-agency controls.
• Temporary importation under bond: generally twice the estimated duties including the merchandise processing fee, with higher amounts for some categories.
• Antidumping and countervailing duty risk: CBP may demand an extra single transaction bond tailored to the evidence of risk, even when a continuous bond is on file.

Timing matters as much as amount. A single transaction bond takes effect on the date of the transaction shown on CBP Form 301 under 19 CFR 113.26(b), and the guide notes that its amount can be increased only during the ten-day window between entry and entry summary. After that, an underbonded entry has to be covered some other way.

Sizing a continuous bond with CBP's reviewer and analytical formulas

The Activity Code 1 continuous bond starts at the greater of $50,000 or 10% of total estimated duties, taxes and fees in the previous 12 months, for every principal, co-principal and user on the bond. All continuous bonds round up in $10,000 steps to $100,000, then in $100,000 steps. CBP calls this the reviewer formula, and it is the number most finance teams already know.

The analytical formula is what catches companies out. CBP adds 10% of delinquent bills that are either protested or unprotested and under 210 days past due, and 100% of unprotested bills over 210 days, bills tied to a denied protest, and unpaid debit vouchers. A bill counts as delinquent when it is unpaid more than 30 days after issue, under the guide's reference to 19 USC 1505(d).

Activity Code 1 continuous bond amount (CBP Publication 3569-0224, section 6.4.1 and Appendix B)

  R  = 0.10 x DTF_12          # reviewer formula
  X  = 0.10 x D_recent        # protested, or unprotested and under 210 days past due
     + 1.00 x D_old           # unprotested over 210 days, or denied protest
     + 1.00 x V_unpaid        # unpaid debit vouchers
  T  = max(R + X, 50000)

  if T <= 100000:  Bond = ceil(T / 10000)  x 10000
  else:            Bond = ceil(T / 100000) x 100000

  DTF_12   = estimated duties, taxes and fees for the previous 12 months, all parties on the bond,
             excluding entry types 05, 11, 12, 26, 31, 32, 34, 38, 47, 51 and 86
  D_recent = delinquent bills (unpaid > 30 days) in the 10% band, USD
  D_old    = delinquent bills in the 100% band, USD
  V_unpaid = unpaid debit vouchers, USD
  New importer with no history: DTF_12 = its own estimate for the next 12 months, floor $50,000

Two practical details follow from the excluded list. Warehouse withdrawals and foreign trade zone admissions do not count toward the 10% base, so an importer that moves volume into a bonded warehouse may see a smaller reviewer number than its duty spend suggests. And because merchandise processing and harbor maintenance fees count as fees, our MPF and HMF calculation guide is the right place to rebuild the fee half of the base.

Continuous customs bond sizing under CBP Publication 3569-0224 takes 10% of the previous 12 months' duties, taxes and fees, adds 10% or 100% of delinquent bills and all unpaid debit vouchers, applies a $50,000 floor, and rounds up in $10,000 steps to $100,000 and $100,000 steps above.

Where single bonds stop being cheaper than an annual bond

Surety premiums are set by each surety, so the comparison has to use your own quotes; the figures below are assumptions for illustration only. The structure, though, is fixed by CBP's rules: a single bond's face follows each shipment's value plus duty, while a continuous bond's face follows a year of duty. The more entries, the faster the single-bond total overtakes the annual one.

The table runs both markets through one year. The US column sizes a continuous bond for a mid-sized importer where arrears push it over a rounding step, and prices six single bonds for an occasional importer. The Indian column sizes a warehousing bond and a general bond for an importer that keeps up to three consignments in a warehouse at once.

The US arrears line is the lesson worth keeping. Paying the $52,000 in old bills and the $3,500 voucher before the bond review would have kept the face at $200,000. The guide confirms that if unpaid bills are settled before the deadline in an insufficiency notice, and the Revenue Division is told in time, CBP recomputes the amount.

Insufficiency notices: the 15-day window and interim security

An insufficiency notice gives the principal 15 days from notification to fix the bond. Under 19 CFR 113.13(c), CBP reviews bonds periodically, writes to principal and surety when one is inadequate, and may require a cash deposit or single transaction bond on any and all of the principal's transactions until the deficiency is remedied. Section 113.13(d) lets CBP demand extra security immediately where revenue is in jeopardy.

Only the Director of the Office of Finance, Revenue Division issues continuous bond insufficiency notices, according to CBP's 2024 guide, while port and center directors can demand an additional single transaction bond for a specific entry, for example through an entry summary rejection or a CBP Form 29 Notice of Action. The timeline below shows how a missed notice turns into storage charges; dates are illustrative.

1. 12 February, 10:15: the Revenue Division emails an insufficiency notice to the importer and surety. Required face: $300,000 against $100,000 on file. The email lands in a shared inbox nobody triages that week.
2. 20 February, 15:30: the surety agent asks for audited financials before writing a larger bond. The request is forwarded to finance without the CBP notice attached, so it is treated as a routine renewal.
3. 27 February, 23:59: the 15-day remedy period ends with the old bond still on file.
4. 2 March, 08:30: the broker's entries for three containers on bill of lading MAEU-77821 now need single transaction bonds at value plus duty. Release slips two days and terminal storage accrues on each box.
5. Controlled version: a rule routes any Revenue Division email to the controller, the overdue bills are paid on 16 February, the Revenue Division is notified, and a $200,000 superseding bond takes effect on 24 February.

Effective dates, terminations and the gap that strands cargo

A continuous bond takes effect on the date shown on CBP Form 301 and may be filed up to 60 days in advance under 19 CFR 113.26. That lead time is the controller's best tool: a larger bond can be lined up before the old one is terminated, rather than racing a notice. The risk lies in terminations, because Section 113.27(c) bars any new customs transaction on a terminated bond.

• Principal terminates: a written request to the Revenue Division takes effect on the requested date if it is at least 10 business days after CBP receives it, or on the tenth business day if no date is given.
• Surety terminates: the surety may stop accepting future obligations on reasonable notice to CBP and the principal; 30 days is reasonable unless the surety justifies less.
• Old obligations survive: a surety cannot disavow liabilities already incurred, so entries filed under the old bond stay secured by it.
• Electronic filing: CBP's eBond test began on 3 January 2015 and lets approved sureties transmit continuous and single transaction bonds to ACE.

Customs bond changeover under 19 CFR 113.26 and 113.27 works when the superseding continuous bond is filed up to 60 days ahead of its effective date, because a principal's termination takes effect no sooner than 10 business days after CBP receives it and no entry may be charged to a terminated bond.

India's warehousing bond: per-consignment triple duty or a general bond

India does not ask for a standing bond on every home-consumption entry; Circular 04/2025 lists its bonds by procedure instead. The best-known is warehousing. Since the Finance Act 2016 amendment, Section 59(1) of the Customs Act 1962 requires an importer filing a bill of entry for warehousing to execute a bond equal to three times the duty assessed on the goods.

Section 59(2) allows the Assistant or Deputy Commissioner to permit a general bond for a stated period instead of one bond per consignment. The format circulated with Board Circular 18/2016-Customs carries a schedule with columns for the bill of entry number, duty assessed, bond value at three times duty, debit, credit and running balance, each entry signed by the officer, so the general bond behaves like a revolving limit.

• Cover while goods move: the bond stays in force until the goods are cleared for home consumption or exported, and continues through transfer to another warehouse.
• Recovery route: the format lets the department recover amounts due under the bond in the manner of Section 142(1), without excluding other recovery modes.
• Sizing a general bond: size it for the peak number of undischarged bills of entry, not the annual total, because each clearance credits the balance back.

Our guide to bonded warehouse ex-bond reconciliation covers the warehouse ledger once goods are inside; this section deals only with sizing the bond itself. For the wider choice between warehousing, free trade zones and MOOWR, see our comparison of bonded warehouses, FTZs and FTWZs.

Ekal Anubandh: one electronic bond across Indian ports and purposes

Circular 04/2025-Customs, dated 17 February 2025, lets an importer or exporter replace transaction-wise bonds at each port with a Single All-India Multipurpose electronic Bond. The bond is applied for on ICEGATE at any port, covers the obligations the trader selects, can be topped up later, and is e-stamped and e-signed through National E-Governance Services Limited without a notary.

The circular lists the bond families it replaces: provisional assessment, export promotion schemes, Section 59 warehousing, and MOOWR operations under Section 65. Its procedure annex also names re-export and imports under Section 143. Bank guarantees are linked electronically to the bond number and need be furnished only when an import or export actually requires one.

India's single electronic customs bond under CBIC Circular 04/2025-Customs covers Section 59 warehousing, provisional assessment and MOOWR obligations in one ICEGATE filing; Annexure F sets bank guarantee percentages, from 0% for non-sensitive goods in their first warehoused year to 100% for sensitive goods held beyond one year in a private warehouse.

Adoption is now mandatory in practice at some ports. Jawaharlal Nehru Custom House's Public Notice 01/2026 says the electronic bond has run in Maharashtra since 3 October 2025 and that manual bonds and bank guarantees stopped being accepted at the end of 31 January 2026. Importers using other ports should check their own commissionerate's notices before planning a renewal.

Bond headroom checks a system can run and calls a person must make

Most bond work is recomputation, which software does well; the judgements are about classification, risk and cash. The table separates the two by the actual task, so a controller can see which steps belong in a scheduled job and which need a named reviewer.

A controller's checklist for choosing and renewing customs bonds

Treat the bond as a recurring finance control with a calendar, not a broker formality. The checklist below works for a first bond, an annual renewal or a response to a notice, and each line has a test that an internal auditor can repeat. Where a step is India-specific, the market is named in the control.

Bond headroom rarely fails on its own; it usually fails alongside exam holds and late entry summaries, which our guide to customs exam holds covers. More finance and trade guides sit on the logistics and supply chain hub. If you want the headroom calculation and notice routing built into your ERP or customs platform, you can send us your requirements and we will scope the controls with your broker and surety data.