Most DTC brands sign 3PL contracts focused on price per pick. That's understandable. But while you're negotiating cost, the clauses that actually determine your customer experience are sitting in the fine print—unread.
Fulfillment SLAs are not just legal boilerplate. They are the operational promises your 3PL is making to your brand. Get them wrong and you're locked into a relationship that looks fine on paper until it very much isn't.
The SLA Everyone Focuses On (But Misunderstands)
Ship time is the first thing brands ask about. "Do you offer same-day or next-day fulfillment?" Fair question. But the answer is almost meaningless without a cutoff time and an accuracy qualifier attached to it.
A 3PL that promises "same-day shipping" with a 10am order cutoff is only same-day for a fraction of your daily volume. And a fast shipment with the wrong item is worse than a slow one — you've now paid for the shipping and the return.
What you actually want: a ship-time SLA measured against a reasonable cutoff (noon or later), with a documented accuracy rate sitting above 99.5%.
The SLA Nobody Asks For
Receiving time. This one is almost universally ignored and routinely abused.
When you send inbound inventory to your 3PL, how long until it's checked in, counted, and available to ship? At some large 3PLs, that window can stretch 5-10 business days. During a product launch or a restock after a stockout, that delay costs you real revenue.
Negotiate a receiving SLA of 2 business days maximum from the time freight is unloaded at their dock. Get it in writing. Then ask them what their average receiving time was over the last 90 days — that number will tell you more than any sales pitch.
Order Accuracy: The Number That Drives Your Review Score
Order accuracy is the most direct link between your 3PL's operations and your brand's reputation. A wrong item or a missing unit doesn't just create a support ticket — it creates a 1-star review, a chargeback dispute, and a customer who doesn't come back.
Industry average order accuracy across 3PLs hovers around 98-99%. That sounds good until you do the math. At 98% accuracy on 10,000 monthly orders, you have 200 errors per month. At scale, that's a retention problem.
Hold your 3PL to 99.5% minimum, and ask for a documented remediation process when errors occur — who eats the reshipping cost, what's the resolution timeline, how do they track root cause.
Damage and Shrinkage Clauses: Read These Carefully
Most 3PL contracts cap their liability for lost or damaged inventory at a fixed dollar amount — sometimes as low as $50 per unit regardless of actual product value. If you're selling a $200 skincare set or a $150 supplement bundle, that clause is a significant financial exposure.
Negotiate liability coverage that reflects your actual COGS. And get clear language around what constitutes a "shrinkage" event versus a fulfillment error — the distinction matters when you're trying to get made whole.
What a Real SLA Conversation Looks Like
A 3PL worth partnering with won't flinch when you ask these questions. They'll have the numbers ready.
At MFS, every brand partner gets documented SLAs on ship time (99%+ of orders out within 24 hours), order accuracy (99.9%), and inbound receiving. We track these internally and share the data. If we miss, we own it.
That's not a pitch. That's just what a real operational commitment looks like.
What to Actually Negotiate
Here's the short version of what belongs in your 3PL contract:
- Ship-time SLA: % of orders shipped within 24 hours, with a clear cutoff time
- Order accuracy SLA: 99.5% minimum, with error remediation terms
- Receiving SLA: Maximum days from dock to available inventory
- Liability coverage: Per-unit value, not a flat cap
- Reporting cadence: How often you get performance data and in what format
- Escalation path: A real human contact, not a ticketing queue
The brands that get the most out of their 3PL relationships aren't the ones who negotiate the lowest pick fee. They're the ones who locked down accountability before the contract was signed.