How do I set shipping rates (flat, table, real-time) for my online store?

Shipping is one of those “small” settings that quietly decides whether customers convert, whether you make money on orders, and whether you spend your evenings answering “where’s my package?” emails. The good news: you don’t need a perfect shipping system on day one—you need one that’s clear, profitable, and easy to run.

Below are the three most common approaches (flat, table, and real-time), when each works best, and how to set them up without accidentally losing money.

Step 1: Decide what “good shipping” means for your store

Before touching settings, get clear on these basics:

1) Your fulfillment reality

Where do you ship from (one location or multiple)?
How do you pack orders (standard boxes, poly mailers, custom packaging)?
What’s your average handling time (same day, 1–2 days, made-to-order)?

2) Your product shipping profile

Light + small (apparel, accessories)?
Bulky or heavy (home goods, pet food)?
Fragile (glass, electronics)?
High/low margins (can you subsidize shipping or not)?

3) Your customer expectation

Do customers expect “free shipping” in your niche?
Are you competing with big retailers?
Is fast shipping a key differentiator—or is price?

Once you know this, picking a rate model becomes much easier.

Option A: Flat Shipping Rates (simple and predictable)

What it is

A single fixed cost customers pay for shipping—e.g. “Standard Shipping: $5.99”—regardless of what they buy (or sometimes regardless within a country/zone).

When flat rate works best

You sell products with similar sizes/weights
Your average shipping cost doesn’t vary wildly
You want simple checkout and fewer customer questions
You’re early-stage and want something you can maintain in minutes

How to set flat rates (step-by-step)

1) Calculate your true average cost per order
Include:

Carrier postage (your typical service)
Packaging (box/mailer, tape, label)
Any fulfillment fees (if applicable)
A buffer for “expensive zones” and occasional surcharges

2) Choose a flat rate strategy
Common versions:

One flat rate (simplest)
Flat rate by zone (e.g., domestic vs international)
Flat rate by speed (standard vs express)
Free shipping over a threshold (more on this below)

3) Set the rate so you don’t lose money
A safe starting point:

If your average cost is $6.20, set $6.99–$7.99 (or keep $5.99 and bake $1–$2 into product pricing).

4) Add guardrails

Exclude oversized items from the flat rate (use a separate rate)
Set a minimum shipping charge for heavy categories
If you offer international, consider a separate method entirely

Example flat setup

Standard (2–5 business days): $6.99
Express (1–2 business days): $14.99
Free standard shipping over $75

Option B: Table Rates (rules-based pricing that scales)

What it is

Shipping cost determined by a table of rules, typically based on:

Order value (cart total)
Weight
Item count
Destination zone
Product category / shipping class

Table rates are a great middle ground: more accurate than flat, simpler than real-time.

When table rates work best

Your costs vary by weight, cart size, or region
You want predictable pricing but better profitability
You sell a mix of light items and heavier/bulkier items

How to build table rates (step-by-step)

1) Pick your “rate driver”
Choose the variable that correlates best with shipping cost:

Weight-based is great for physical goods
Item count is good for uniform items (candles, tees)
Order total works well when margins scale with price
Zone + weight is the most accurate without real-time

2) Create shipping zones
At minimum:

Domestic
International (and optionally: nearby countries vs rest of world)

3) Add shipping classes (if needed)
Examples:

“Standard” (most items)
“Bulky” (oversized)
“Fragile” (extra packaging/insurance)

4) Build the table using your real costs
Use actual carrier quotes for a few common order types:

Light order (0.5 kg / 1 lb)
Medium order (2 kg / 4 lb)
Heavy order (5 kg / 11 lb)
Check a nearby and far-away zone.

5) Add a buffer
Shipping gets weird. Include room for:

Dimensional weight surprises
Peak season rate hikes
Remote area fees
Returns/replacements

Example: Weight-based table (domestic)

0–0.5 kg: $4.99
0.51–2 kg: $7.99
2.01–5 kg: $12.99
5.01–10 kg: $19.99

Example: Order-total table (domestic)

$0–$49.99: $6.99
$50–$99.99: $4.99
$100+: Free

Tip: Order-total tables can boost average order value, but make sure the free-shipping threshold is high enough that your margin covers it.

Option C: Real-Time Carrier Rates (accurate, automated pricing)

What it is

Checkout rates pulled live from carriers (or a shipping app), based on:

Customer address
Package weight and dimensions
Shipping speed
Carrier pricing and surcharges

When real-time rates work best

Your products vary a lot in size/weight
You ship to many zones and costs swing significantly
You want the most accurate pricing without manual maintenance
You have consistent product weights/dimensions set up

How to set up real-time rates (step-by-step)

1) Gather accurate product data
Real-time pricing only works if your catalog is correct:

Weight for every product (including packaging if you prefer)
Dimensions for products or the typical packed box sizes
If your platform supports it: define which box sizes you use

2) Connect your carrier accounts or shipping provider

Add carrier(s) you actually ship with
Confirm origin address(es)
Configure pickup/dropoff assumptions

3) Choose services to show at checkout
Don’t overwhelm customers. Most stores show 2–3:

Cheapest/Standard
Faster/Express
Sometimes: best value

4) Decide how you’ll handle surcharges and rounding
Customers dislike seeing $13.27.
Common approach:

Round up to the nearest whole number
Add a small handling fee (or build handling into product prices)
Cap shipping for customer friendliness (optional)

5) Test edge cases

A far-away postal code
Heavy cart
A cart with bulky + standard items
International address formats

Common pitfalls with real-time rates

Missing product weights/dimensions → wildly wrong prices
Dimensional weight not accounted for → you undercharge
Too many carrier options → decision fatigue and abandoned carts
Rate shock → consider showing a “standard shipping” default and keeping express optional

Hybrid strategies (what many successful stores use)

You don’t have to pick only one model.

Popular combos:

Flat rate + free shipping threshold

Simple, conversion-friendly
Great for brands focused on marketing + growth

Table rates for domestic + real-time for international

Domestic stays predictable
International stays accurate (where variance is biggest)

Real-time rates + “Shipping Saver” option

Show real-time options, but include a store-controlled “Standard” method that stays reasonable

Table rates + shipping classes

Standard items follow a table
Bulky/fragile items trigger a different rate method

Setting a free shipping threshold (without losing money)

Free shipping works when it’s funded by margin.

A simple way to estimate your threshold:

Find your average gross margin per order
Example: $60 AOV × 55% margin = $33 gross margin
Subtract your average shipping cost you’ll cover
$33 – $8 shipping = $25 left for operations/profit
Choose a threshold that increases AOV enough
If your AOV is $60, try $75–$90 and track results.

Rule of thumb: Set the threshold about 20–40% above your current average order value and adjust based on data.