Hey there,

Your purchase order shows the product cost.

It does not show:

The box it ships in. The insert you designed at 3am because "unboxing experience matters." The prep fee your 3PL charges every time they touch a unit. The dimensional weight surcharge from FedEx because your box is 2 inches too tall. The return you processed last week. The customer service ticket about that defect batch.

COGS is just the beginning.

Beyond the PO lies a landscape of costs most founders never audit. They show up as lump sums on your P&L — "Shipping," "Fulfillment," "Operations" — and they eat margin quietly. Month after month. Year after year.

And they add up to way more than you think.

I recorded a podcast episode that goes deeper on this topic — including a conversation with a 3PL operator who breaks down exactly where fulfillment costs hide and how to negotiate them down.

If you're commuting or doing warehouse walks this week, queue it up. It's the perfect companion to what you're about to read.

Here's what I see constantly: a founder looks at their P&L, sees a healthy gross margin — 55%, 60%, maybe even 65% — and thinks they're doing great.

Then they look at their bank account and wonder where all the money went.

The answer is hiding in those line items you've never broken down. "Shipping & Fulfillment" isn't one cost — it's fifteen costs wearing a trench coat pretending to be one line item.

I once worked with a founder who was convinced her 3PL was overcharging her. She was ready to switch providers, go through the nightmare of a warehouse transition, uproot her entire operation.

We ran the audit. Turns out her 3PL rates were actually competitive. The problem? Her packaging was oversized by 3 inches in one dimension, triggering dimensional weight charges on 80% of her orders. She was paying for air.

One box redesign. $19K saved annually. No warehouse move required.

That's the power of actually knowing where your costs are.

Let me break down where margin actually dies for most DTC brands.

1. Packaging Materials

Boxes. Inserts. Tissue paper. Branded tape. Thank-you cards. Stickers. That cute crinkle paper that "elevates the experience."

Every element adds up. And most founders have never calculated their true packaging cost per unit.

I worked with a beauty brand spending $4.20 per order on packaging. They thought it was $2.50. The difference? $1.70 × 30,000 orders/year = $51K they didn't know they were spending.

Audit question: What's your true all-in packaging cost per order?

2. Labeling and Prep Fees

Every time your 3PL touches a unit, there's a cost. Receiving. Put-away. Labeling. Kitting. Bundling. Poly-bagging.

These fees are often buried in your monthly invoice as "prep" or "value-added services." Most founders glance at the total and move on.

But here's the thing: some of these touches are avoidable. If your supplier can label units before shipping, you save the 3PL touch. If you can reduce kitting complexity, you save per-unit fees.

Audit question: How many times does your 3PL touch each unit, and what does each touch cost?

3. Dimensional Weight Surcharges

This is the silent killer. Carriers charge based on either actual weight or dimensional weight — whichever is higher.

Dimensional weight = (L × W × H) ÷ DIM factor.

If your product weighs 1 lb but your box dimensions calculate to 3 lbs DIM weight, you're paying for 3 lbs. You're literally shipping air.

I've seen brands where 70%+ of orders trigger DIM surcharges. A box that's 1 inch smaller in each dimension can drop you into a cheaper shipping tier and save thousands annually.

Audit question: What percentage of your orders are charged at DIM weight vs. actual weight?

4. Return Processing

A return isn't just the refund. It's:

→ Outbound shipping (you already paid this)

→ Return shipping (often you're paying this too)

→ 3PL receiving fee

→ Inspection/restocking fee

→ Potential disposal if unsellable

→ Customer service time

→ Refund processing fees

A $50 product with a return can easily cost you $20-30 in total return processing. If your return rate is 15%, that's a massive margin drain.

Audit question: What's your true all-in cost per return?

I recorded a YouTube video showing exactly how to run this audit — including where to pull the data and how to calculate cost-per-unit for each category.

If you're a visual learner or want to see me actually run the numbers on a real brand's data (anonymized), this is for you.

A defect doesn't just cost you the unit. It costs you:

→ The replacement unit

→ Shipping (again)

→ Customer service time

→ Potential negative review

→ Customer lifetime value damage

And here's what most founders miss: defects multiply across the chain. A 2% defect rate at the factory becomes a 2% higher return rate, 2% more CS tickets, 2% more replacement shipments.

The brands that win are the ones who trace quality issues back to root cause and fix them at the source — usually for pennies compared to what the downstream costs are.

Audit question: What's your defect rate, and what's the total downstream cost per defect?

6. Customer Service Load by SKU

Not all products are created equal when it comes to support burden.

I've seen SKUs that generate 5x more customer service tickets than others. Confusing sizing. Fragile components. Unclear instructions. Missing pieces.

If you're not tracking CS tickets by SKU, you have no idea which products are secretly unprofitable. That "high margin" item might be eating its margin in support costs.

Audit question: Which SKUs generate the most customer service tickets per unit sold?

7. Storage Costs

Every unit sitting in your warehouse is rent on your money.

Your 3PL charges storage — usually per pallet, per bin, or per cubic foot. The longer inventory sits, the more you pay. And if it sits past 90 days? Many 3PLs hit you with long-term storage fees that can double or triple your rate.

This connects directly to what we covered in Inventory Month: slow-moving SKUs aren't just tying up cash — they're actively costing you storage fees every month they sit.

Audit question: What are you paying in storage for inventory over 90 days old?

Before I get to the case study — quick reminder that the Inventory + Cashflow Workshop is THIS WEEK.

I've mentioned it in the last few newsletters. This is the last time I'll bring it up.

If you've been following along with Inventory Month and thinking "I know I have cash trapped, but I'm not sure how to actually fix it" — this workshop connects the dots.

We cover:

→ Why "months of supply" is meaningless without velocity context — and what to measure instead

→ How to calculate your Cash Conversion Cycle by SKU (the number from Week 2)

→ The reorder timing system from Week 3 — implemented live

→ The $120K case study from Week 4 — how she actually did it, step by step

This is the live version of everything from Inventory Month, with Q&A, templates, and me walking you through your specific situation.

After this week, the workshop recording goes into the vault. No more live sessions until Q3.

Let me tell you about a brand I worked with last year.

$3.2M annual revenue. Apparel and accessories. Healthy growth. Founder was convinced her margins were solid — her P&L showed 58% gross margin.

Then we ran the hidden cost audit.

Here's what we found:

→ Packaging materials: $47K/year (she thought it was $28K)

→ DIM weight surcharges: $23K/year (she had no idea)

→ Return processing: $18K/year (only counted refunds before)

→ Prep fees: $12K/year (buried in 3PL invoice)

→ Quality-related costs: $8K/year (replacements + CS time)

Total: $108K that never appeared on a purchase order.

That's 3.4% of revenue. Pure margin leak.

After optimization:

→ Packaging redesign: $47K → $31K (simpler insert, right-sized box)

→ DIM optimization: $23K → $14K (box resize, carrier negotiation)

→ Return reduction: $18K → $14K (better product photos, sizing guide)

→ Prep consolidation: $12K → $8K (supplier pre-labeling)

→ Quality improvements: $8K → $4K (supplier QC process)

New total: $71K. $37K back to margin.

Same revenue. Same products. Different understanding of where the money was going.

Here's how to run this on your own business.

Step 1: List all cost categories beyond COGS.

Start with the 7 categories above. Add any that are specific to your business. Don't leave anything out because it "seems small." Small × thousands of orders = not small.

Step 2: Pull actual 12-month spending.

Not guesses. Not estimates. Actual numbers from invoices, 3PL reports, carrier statements. This is where most founders quit because it's tedious. Don't quit. The tedium is where the money hides.

Step 3: Calculate cost per unit.

Take each category's annual cost and divide by units shipped. This gives you the true per-unit burden. Suddenly "$23K in DIM charges" becomes "$0.77 per order" — which is way easier to optimize.

Step 4: Rank by total impact.

Sort your categories by annual cost. The top 3 are where you focus. Don't try to optimize everything at once — that's how you burn out and change nothing.

Step 5: Pick top 3 to optimize.

For each of your top 3, ask: What would it take to reduce this by 20%? Sometimes it's a negotiation. Sometimes it's a process change. Sometimes it's a box that's 2 inches smaller. The answer is usually simpler than you think.

I have never done this audit with a brand and found nothing to fix. Not once. In 17 years.

This is Week 1 of The Hidden Margin Killers series:

Week 1 (this week): The costs that don't show up on your PO

Week 2: The DIM Weight Problem — how to stop paying for air

Week 3: The Fulfillment Cost Audit — what your 3PL isn't telling you

Week 4: The $18K/year Packaging Redesign — a step-by-step case study

By month end, you'll have optimized costs that most founders never even think to touch.

If you're reading this and thinking "I need help running this audit" or "I want someone to look at my numbers with me" — that's exactly what the Accelerator is for.

The Supply Chain Accelerator is a 12-week program where we build your supply chain systems together. Not theory. Actual implementation on your business.

What you get:

→ All 11 modules (including the full Hidden Cost Audit framework with templates)

→ Weekly live calls with me — bring your questions, your data, your stuck points

→ Direct Slack access for async support

→ Hot seat coaching where we work on your specific challenges

→ Community of 9 other founders at your stage

The average Accelerator student finds more in hidden costs and trapped cash in their first month than the program costs. That $108K brand from today's case study? She was in Cohort 3.

Q2 Cohort starts in May. If you're doing $200K-$3M in revenue and want to stop leaving money on the table, this is your path.

Not ready for the full cohort? Self-paced is $500 — same modules, same templates, same community. Just without the live calls and direct access.

Reply with what you find in your audit. I read every response — and I'll tell you if something looks off.

Until next time,

Lara

P.S. The most dangerous costs are the ones you've categorized as "just part of doing business." That's the phrase that lets margin die quietly. This month, we stop accepting that.

P.P.S. If you haven't done Inventory Month yet, go back. The cash you free from inventory is the cash you'll use to implement the optimizations from this month. They work together. And if you want the live walkthrough before the recording goes away — the workshop is this week.