Shipping costs are eating into e-commerce margins faster than ever. UPS and FedEx each raised rates by 5.9% in 2025, and those increases compound on top of residential surcharges, delivery area fees, and fuel charges that can add 15 to 30 percent to a base rate. For most e-commerce businesses, shipping is the second-largest operating expense after inventory — and it keeps growing.
The good news: most businesses are leaving significant savings unclaimed. Nine out of ten shippers overpay on their carrier contracts, according to Shipware’s benchmarking data from hundreds of client engagements. The strategies below will show you exactly where to find those savings and how to lock them in before your next peak season.
Want to find out how much your business is overpaying? Request a free shipping analysis from Shipware — no carrier switch required.
1. Audit Your Carrier Contracts Before Anything Else
Most e-commerce shippers negotiate on base rates and ignore the other 249+ terms in their contracts. That is exactly what carriers count on. Accessorial charges — residential delivery fees, address correction charges, extended delivery area surcharges, large package fees — frequently exceed base rates on a given shipment. Carriers have built entire pricing teams around maximizing revenue from these line items while shippers focus only on the headline discount.
A proper contract audit looks at every component: base rates, minimum charges, dimensional weight divisors, fuel surcharge percentages, and tier thresholds that could trigger lost discounts. It also benchmarks what you’re paying against what comparable shippers in your industry actually pay. Without that market context, you have no way to know whether your rates are competitive.
Shipware’s contract optimization team — built from former UPS and FedEx pricing executives — has analyzed thousands of shipping contracts. Their benchmarking database covers clients from $50,000 to $100 million in annual shipping spend, which means they can show you exactly where your rates stand against actual market data, not published rate cards.
Learn more about what a full contract review covers: Parcel and LTL Contract Optimization by Shipware.
2. Implement a Multi-Carrier Strategy
Depending entirely on UPS or FedEx leaves you with no negotiating power and no backup when service disruptions hit. A multi-carrier approach — using a primary carrier for high-volume lanes while routing specific packages to regional carriers or USPS — creates both cost savings and resilience.
Regional carriers typically charge 10 to 20 percent less than national carriers for last-mile delivery in their coverage zones. For e-commerce businesses shipping heavy volumes to specific geographies, that difference adds up quickly. USPS Priority Mail remains competitive for lightweight packages under one pound shipped to residential addresses, where FedEx and UPS residential fees push costs higher.
The key to making multi-carrier work is carrier selection logic — rules that automatically assign each shipment to the lowest-cost carrier that meets the required service level. This requires visibility into rates across all carriers at the time of shipment, which is where a spend management platform becomes critical.
For a full breakdown of how to structure a multi-carrier approach: Multi-Carrier Shipping Strategy: What, Why and How.
3. Recover Money You Are Already Owed: Invoice Auditing
Carrier billing errors are common. Service failures, duplicate charges, incorrect weight measurements, and misapplied surcharges account for 1 to 9 percent of total invoice value across the industry — meaning a company spending $1 million annually on shipping could be owed $10,000 to $90,000 in refunds each year. Most of it goes unclaimed because businesses do not have the time or systems to audit every line item on every invoice.
Automated invoice auditing catches these errors systematically. Shipware’s audit service runs a 65-point check on every shipment, filing refund claims directly with carriers and crediting recoveries back to your account. The service pays for itself: if no savings are found, there is no fee.
Ready to recover overpayments from your last 12 months of invoices? See how Shipware’s invoice audit service works.
4. Use Zone Skipping to Reduce Ground Shipping Costs
Carrier pricing is zone-based: a package shipped from your warehouse to a zone 8 destination costs significantly more than the same package going to zone 2. Zone skipping is the practice of consolidating outbound shipments, using a freight carrier to move them closer to their final destinations in bulk, then injecting them into local carrier networks at a lower zone rate.
For e-commerce businesses with predictable shipping patterns — heavy volume to specific regions, for example — zone skipping can reduce per-package ground shipping costs by 15 to 40 percent. The math works best when you have enough volume to fill trailers on a regular schedule and when your average shipment weight is high enough that ground carrier savings outweigh the consolidation cost.
This strategy requires upfront modeling: you need to know your shipment distribution by zone, average package weight, and carrier rate schedules before calculating expected savings. See the zone skipping breakdown here: Zone Skipping: How It Reduces Parcel Shipping Costs.
5. Get Control of Accessorial Charges
Accessorial charges are the hidden cost driver in most e-commerce shipping budgets. Fuel surcharges have fluctuated between 15 and 30 percent. Residential delivery fees add $5 to $8 per package. Extended area surcharges apply to thousands of ZIP codes that most businesses would not consider “rural.” Delivery area surcharges, large package fees, Saturday delivery charges — each one is negotiable, but only if you know what you’re paying and what the market rate is.
The 2026 surcharge environment is more complex than it was two years ago. Both UPS and FedEx have expanded their surcharge schedules, and peak season surcharges — which were introduced as temporary measures in 2020 — are now a permanent feature of the pricing landscape, adding up to 30 percent during Q4.
Addressing accessorials requires two things: visibility (knowing what you’re being charged and why) and negotiating power (having market data to push back). Neither comes from your carrier account rep. They come from your own audit data and from benchmarking against what similarly-sized shippers are actually paying.
For a detailed breakdown of how to manage surcharges: A Strategic Guide to Parcel Surcharge Optimization.
6. Build Real-Time Shipping Visibility Into Your Operations
You cannot manage what you cannot measure. Many e-commerce businesses track orders for customers but have surprisingly poor visibility into their own shipping spend — they know total invoice amounts but not cost per shipment, cost per zone, cost by service type, or how actual spend compares to negotiated rates.
A spend management platform that integrates carrier invoice data in real time gives you the analytics foundation for every other optimization strategy on this list. You can see where accessorial charges are spiking, which carriers are performing against SLAs, how dimensional weight charges compare to actual weights, and whether carrier billing matches contracted rates.
Shipware’s spend management portal provides this visibility, with dashboards designed for logistics managers and finance teams. Clients typically identify additional savings opportunities within the first 60 days of using the platform, simply from having visibility they previously lacked.
Explore the spend management portal: Shipware Spend Management Portal.
7. Right-Size Your Packaging to Cut Dimensional Weight Charges
UPS and FedEx both bill based on dimensional weight (DIM weight) when it exceeds actual weight. DIM weight is calculated by dividing package volume (length x width x height in inches) by a divisor — currently 139 for most services. A package that is physically light but takes up a lot of space will be billed at DIM weight, not actual weight.
For e-commerce businesses shipping lightweight products in oversized boxes, DIM weight charges can double or triple the cost per shipment. Right-sizing packaging to fit products more closely is one of the few shipping optimizations that requires no carrier negotiation — it is entirely within your control.
Beyond DIM weight, packaging optimization reduces material costs, cuts waste, and can improve packing speeds. Some operations find that investing in a carton selection algorithm — software that automatically selects the smallest appropriate box for each order — pays back its cost within months through reduced carrier charges alone.
Want a full picture of where your shipping budget is going and what to fix first? Start with Shipware’s free analysis — their team identifies the highest-ROI opportunities for your specific shipping profile.
8. Negotiate LTL Rates If You Move Freight
E-commerce businesses that also ship freight — replenishing 3PL inventory, moving products between distribution centers, or fulfilling B2B orders — often neglect LTL optimization. LTL rates are just as negotiable as parcel rates, and carriers apply the same annual general rate increases (Old Dominion: 4.9% in 2025; Saia: 7.9%) to LTL as they do to parcel.
LTL pricing involves freight classification, lane-specific rates, accessorial charges for liftgate service, residential delivery, and limited access locations, plus fuel surcharges. The complexity creates the same opportunity as parcel: benchmarking what you pay against market rates typically reveals significant gaps.
See how LTL negotiation works: A Shipper’s Guide to LTL Rate Negotiation.
What Results Should You Expect — and How Quickly?
One of the most common questions from e-commerce logistics teams is how long it takes to see results from a shipping optimization effort. The honest answer depends on which strategies you pursue and where you start.
Invoice auditing is the fastest to show returns. Because it runs against historical invoices, refunds can start appearing within the first billing cycle. Businesses with 8 to 12 months of carrier invoices will often see the audit recover several months of fees within the first 30 to 60 days.
Contract renegotiation takes longer but produces the largest returns. The negotiation itself typically runs four to eight weeks. Once a new contract is in place, the savings apply to every shipment going forward. For a company spending $2 million annually on parcel, a 20 percent improvement translates to $400,000 per year — a return that compounds every year the improved contract is in force.
Packaging optimization and multi-carrier routing improvements can be tested and measured within a few weeks of implementation. Zone skipping requires more lead time to model and set up, but the per-shipment math is clear once volume patterns are established.
The most effective approach is to pursue multiple strategies in parallel rather than sequentially. Shipware works with clients across all of these areas simultaneously — their gainshare model means there is no upfront fee, and their team brings the market intelligence to move faster than a typical internal project would.
See what a full optimization engagement covers: Shipware’s full suite of shipping optimization services.
Frequently Asked Questions
What is e-commerce shipping optimization?
E-commerce shipping optimization is the process of reducing shipping costs and improving delivery performance through a combination of carrier contract negotiation, multi-carrier strategy, invoice auditing, packaging improvements, and data visibility. The goal is to reduce per-shipment costs without changing service levels or switching carriers.
How much can e-commerce businesses save by optimizing shipping?
The typical savings range is 10 to 30 percent of total annual shipping spend, depending on the current state of carrier contracts and which strategies are applied. Shipware’s clients have averaged 21.5 percent savings across all engagements. Individual case studies document savings from $300,000 to $8.5 million annually.
Do I need to switch carriers to reduce shipping costs?
No. Most shipping optimization strategies work with your existing carriers. Contract renegotiation, invoice auditing, accessorial charge reduction, and DIM weight optimization all apply to current carrier relationships. Multi-carrier strategies may add regional carriers but do not require abandoning UPS or FedEx.
When is the right time to renegotiate a carrier contract?
You can renegotiate a carrier contract at any time, not just at expiration. After a general rate increase announcement is a particularly strong moment: carriers have already communicated increases, but the actual implementation has not yet happened, giving you a window to negotiate before the new rates take effect.
What is dimensional weight and why does it matter for e-commerce?
Dimensional weight (DIM weight) is a calculated weight that carriers use when a package is light but takes up significant cubic space. The formula is package volume divided by 139 (for most UPS/FedEx services). When DIM weight exceeds actual weight, you are billed at DIM weight. E-commerce businesses shipping lightweight products in large boxes often pay DIM weight charges that far exceed what actual weight would cost.
How does invoice auditing work?
Invoice auditing is the process of reviewing carrier invoices line by line to identify billing errors, service failures, duplicate charges, and incorrect surcharges. Automated audit services run checks on every shipment and file refund claims with carriers when errors are found. Refunds are credited directly to your carrier account. Billing errors typically account for 1 to 9 percent of total invoice value.