AQL stands for Acceptable Quality Limit (also called Acceptable Quality Level). It defines the maximum percentage of defective units in a shipment that you're prepared to accept. For most DTC clothing brands, AQL 2.5 under General Inspection Level II is the correct setting, and it means that for a 100-unit order, an inspector will randomly pull and check 20 pieces before you decide whether to accept or reject the shipment.
At Greige, the garment sourcing platform connecting independent fashion brands with vetted Indian factories, AQL inspection is a standard stage in every production order. It's not optional for your first factory relationship. One skipped inspection on a 200-unit order can mean a whole run of unusable pieces.
The AQL level table
The AQL number sets your defect tolerance. Lower is stricter. Here's how the common AQL levels map to use cases in garment production:
| AQL Level | Tolerance | Typical Use in Apparel |
|---|---|---|
| 0.65 | Near-zero defects | Luxury garments, medical/safety apparel |
| 1.0 | Very tight | High-end fashion, delicate accessories, children's pyjamas with safety requirements |
| 1.5 | Tight | Premium basics, lingerie, childrenswear |
| 2.5 | Standard | Most DTC apparel, the industry default for US and EU brands |
| 4.0 | Relaxed | Commodity basics where cost outweighs defect sensitivity |
Source: ISO 2859-1:1999, Sampling procedures for inspection by attributes.
AQL 2.5 means: in a statistically valid sample from your shipment, you'll accept a batch where up to 2.5% of inspected units have minor defects, provided the sample passes the accept/reject threshold. It does not mean you're accepting 2.5% defects across the whole order. The math is probabilistic, not a direct percentage.
What "General Inspection Level II" means
ISO 2859-1 defines three inspection levels. Level I uses a smaller sample (less certainty, lower cost). Level II is the default, it balances statistical rigour with inspection time. Level III uses a larger sample for higher-stakes shipments.
For most DTC clothing brands on first and second orders from India, Level II is correct. Level I creates too much uncertainty. Level III adds cost without meaningful benefit for standard apparel.
Sample size at AQL 2.5, Level II (ISO 2859-1:1999):
| Order Quantity | Sample Size | Accept | Reject |
|---|---|---|---|
| 26–50 units | 8 pieces | 0 | 1 |
| 51–90 units | 13 pieces | 1 | 2 |
| 91–150 units | 20 pieces | 1 | 2 |
| 151–280 units | 32 pieces | 2 | 3 |
| 281–500 units | 50 pieces | 3 | 4 |
For lot sizes where the standard Code yields fewer than the minimum practical sample, some agencies apply the arrow-up rule and use the next code size. Confirm which sampling plan your QC agency follows before the inspection.
For a 100-unit order, a certified inspector pulls 20 pieces at random from across your cartons. If they find 2 or more defective pieces in those 20, the shipment fails inspection and you negotiate a remedy with the factory before release.
What counts as a defect
Defects are classified into three categories. All three affect your AQL count.
Critical defects are shipment-stopping regardless of AQL. A hole in a visible seam, a mislabelled size, or a safety hazard. Zero critical defects are acceptable at any AQL level.
Major defects affect function or appearance significantly: broken stitching that will fail in use, a colour that doesn't match the approved standard, a zip that won't close. These count against your AQL threshold.
Minor defects affect appearance without affecting function: a loose thread that can be trimmed, a small stitch irregularity that's not visible when worn. These also count, but some buyers set a separate, more lenient threshold for minors.
Agree on defect definitions with your factory, and your inspection agency, before the production run, not after.
Who does the inspection and what it costs in India
You have two options: factory self-inspection or independent third-party inspection.
Factory self-inspection is what happens by default. The factory checks their own work before shipping. It's already included in CMT pricing and is the factory's baseline quality check. For an established factory with a reliable track record, this is often adequate. For a first order with a new factory, it's not sufficient on its own.
Third-party inspection is done by an independent quality control agency. Agencies like Bureau Veritas, SGS, Intertek, and QIMA all operate in India's main garment clusters, including Tirupur, Noida, and Bengaluru. Day rates generally fall into two tiers: smaller local Indian agencies tend to be cheaper, while the large international firms cost more per day. Rates vary by location, garment complexity, and service scope, so get a current quote directly from the agency (for example at qima.com or intertek.com) rather than budgeting off a blanket number. As a rule of thumb, a single inspection day covers a few hundred garments, with the exact count depending on construction complexity and how strict your defect classification is.
For a typical small order, a single inspection day is a modest cost set against the value of a whole run you might otherwise have to write off. It's among the highest-ROI steps in the production process.
The detail most brands miss: how the sample is drawn
Here's the insider fact that separates a real inspection from a box-ticking exercise: the inspector should pull pieces at random from across all cartons, not from the top of a single box.
If an inspector only checks from one or two cartons, they're sampling a narrow production window, likely the pieces packed last, which may have been produced at the end of a run when attention lapses. A properly conducted AQL inspection pulls pieces from different cartons, different production batches if applicable, and different positions in the packing.
Ask your inspection agency specifically: "How do you draw your sample?" Any reputable agency has a documented sampling procedure. If they can't describe it clearly, find a different agency.
When to require AQL inspection vs when you can skip it
Require it:
- First order with any new factory
- Any order above 100 units
- Complex constructions with multiple components (zips, linings, structured padding)
- Any garment with safety requirements (childrenswear, sleepwear)
May skip it (with caution):
- Reorders from a factory with a verified track record of several defect-free shipments
- Orders under 25 units where inspection cost exceeds the risk
- Simple single-layer construction from a factory you have direct visibility into
When in doubt, inspect. One skipped inspection that passes becomes a habit. One that fails, after you've already distributed stock, is expensive.
If you're at the clothing production timeline stage where your bulk production is complete and packing is imminent, that's when AQL inspection happens. Factor 2–3 days for inspection scheduling and reporting into your timeline.
FAQ
What does AQL 2.5 mean in clothing manufacturing? AQL 2.5 means you accept a batch where, in a statistically valid random sample, the defect rate is at or below the 2.5% threshold under ISO 2859-1:1999 sampling tables. It's the industry standard for most DTC apparel brands ordering from India. For a 100-unit order at Level II inspection, the inspector checks approximately 20 pieces and accepts the shipment if 1 or fewer are defective.
How many pieces do I need to inspect in a 100-unit clothing order? For AQL 2.5 under General Inspection Level II (ISO 2859-1:1999), a 100-unit lot requires a sample of 20 pieces. The accept threshold is 1 defective piece; 2 or more defectives means the lot fails inspection. Level II AQL 2.5 is the common standard for factory partner orders.
Who pays for AQL inspection in clothing manufacturing? The brand (buyer) typically pays for third-party inspection. Factory self-inspection is included in CMT pricing. Independent third-party inspection in India is generally cheaper through smaller local agencies and more expensive through the large international firms (QIMA, Intertek, Bureau Veritas, SGS); a single inspection day covers a few hundred garments. Get a current day-rate quote directly from the agency, since rates vary by location and scope. For a 100-unit order, one inspection day is usually sufficient.
Can I use a third-party inspector in India instead of the factory's own QC? Yes. Third-party agencies including Bureau Veritas, Intertek, SGS, and QIMA all operate across India's main garment manufacturing clusters. For first orders with a new factory, a third-party inspection provides independent verification that the factory's own QC cannot.
What happens if my shipment fails AQL inspection? A failed inspection triggers a negotiation with the factory. Typical remedies: 100% inspection of the remaining lot (factory sorts and replaces defective units), rework of identified units at the factory's cost, a price reduction reflecting the defect rate, or in severe cases, rejection of the shipment and remanufacture. Your leverage depends on the severity of the defects and what your purchase order specifies. This is why defect classification, critical, major, minor, should be agreed before production, not after.