Installment Shipments: Definition, Calculation & Concrete Examples

Banks issue installment LCs (also called revolving or tranched credits) that permit multiple drawings. Each installment requires separate document presentation—bill of lading, commercial invoice, packing list—matching the shipped quantity. The LC stipulates tolerance percentages (typically ±5-10%) and deadlines for each installment. Failure to ship one installment may void the entire credit unless the LC includes "independent installments" language.

Customs duties apply to each installment's declared value independently. Authorities treat each shipment as a separate transaction, assessing duties, VAT, and compliance requirements at each border crossing. This means 10 installments generate 10 duty payment events. However, total annual import volumes may trigger different tariff brackets or quotas, affecting effective rates.

Contractual terms dictate cancellation rights. Well-drafted installment contracts include inspection periods and quality thresholds that permit cancellation of future installments without penalty if defect rates exceed agreed levels (e.g., 2% failure rate). Without such clauses, cancellation may constitute breach of contract, exposing you to damages claims for the undelivered portion.

Marine cargo insurance typically covers each installment separately under an open policy. You declare each shipment's value, pay proportional premiums, and receive individual certificates of insurance. The policy's aggregate limit must accommodate all installments. Gaps between deliveries aren't covered unless you purchase warehouse-to-warehouse or annual policy extensions that bridge storage periods.

FOB, CIF, and DAP are commonly used because they clearly define when risk transfers for each installment. Avoid EXW for installments—it places full logistics responsibility on the buyer for each pickup, creating coordination nightmares. DDP works if the seller manages all installments door-to-door, but increases their risk exposure across multiple deliveries.

Yes, absolutely. Customs authorities require individual commercial invoices matching each shipment's contents and value. Each invoice should reference the master sales contract number but show only the specific installment's details. This prevents valuation disputes and ensures proper duty assessment. Consolidated invoicing for multiple installments violates most countries' import documentation requirements.

Optimal spacing depends on your inventory turnover rate and production capacity. Retailers typically schedule 2-4 weeks between installments to match sales velocity. Manufacturers receiving raw materials align installments with production runs, often 1-2 weeks apart. Longer gaps (60+ days) may trigger contract expiration clauses or create financing complications with banks.

Consequences depend on your contract's force majeure and delay provisions. Common remedies include proportional price reductions (e.g., 0.5% per day late), extension of later installment deadlines, or cancellation rights after a cure period (typically 10-15 days). Without explicit late-delivery terms, you're limited to general breach-of-contract remedies, which vary by jurisdiction.

Technically yes, but it's operationally complex and rarely advisable. Different Incoterms® per installment create confusion about responsibility for freight, insurance, and customs clearance. If circumstances require varied terms (e.g., first installment by air, rest by sea), clearly specify in the contract which Incoterm® applies to which installment numbers to avoid disputes.

Installment arrangements reduce working capital strain by aligning payments with deliveries. Instead of financing 100% of inventory upfront, you pay incrementally as goods arrive and sell. This improves cash conversion cycles—studies show importers reduce tied-up capital by 35-50% compared to full-shipment models. However, you may face slightly higher per-unit shipping costs due to smaller container volumes.

Maintain a delivery log cross-referencing the master contract with each installment's bill of lading, commercial invoice, and signed delivery receipt. Final acceptance documents or a completion certificate signed by both parties legally confirm all installments were delivered per terms. This documentation becomes critical if disputes arise or for audit purposes when claiming tax deductions on imported goods.