Know Your Numbers Before You Run a Sale
A 25% discount feels small. On many stores it earns nothing, and some lose money. Here is a ten-minute check across all six costs that tells you the truth before you launch.
The CronosNow Blog
Numbers you can trust. Sales you can action.
Two collections, 56 plain-English guides. The Profit Playbook breaks down the six costs that decide whether a sale makes money. eCommerce Accounting Insights covers tax, COGS, inventory, bookkeeping, and cash flow. Search or filter to find what you need.
Collection 1 of 2
The Profit Playbook
The six profit levers, one at a time, with the exact math to model before you launch.
Lever 1 of 6
Discounts
Sell a Bundle Instead of a Discount
A percentage discount cuts the price on one unit. A bundle sells three units in one order, so the order costs get paid once. See why the bundle wins on every line of your P&L.
Make Free Shipping Grow the Order
Free shipping feels like a cost you just swallow. Put a threshold on it and it becomes the cheapest upsell you will ever run. Here is where to set the line, and how the math works.
Give a Free Gift, Not Money Off
A discount costs you every dollar the customer feels. A well-chosen free gift feels big and costs you little. And the threshold that unlocks it makes the whole cart bigger.
Give the Deal to Repeat Buyers
A 20% subscription discount looks like a profit killer on order one. Judge it over twelve months instead. Every order after the first earns double a normal sale.
Send the Discount Only to the Right People
A public sale converts everyone, including the customers who lose you money. Aim the same discount at the right people instead. Profit multiplies, even while revenue falls.
Sell Old Stock Now, Not Later
Half price feels like losing half your money. It is not. That money was spent when the stock arrived. Clearing now beats holding, and holding beats writing off.
Lever 2 of 6
Refunds
Find the Few Items That Come Back Most
Your refund problem is almost never the whole store. Most of the time it is a few products hiding inside an average. Find them. Fix their pages. Leave the other 237 alone.
Teach Buyers to Cut Returns
Refunds going up? Most founders tighten the rules. Teach the customer instead. A 21-day email series cuts refunds harder than any rule change, and it lifts sales instead of costing them.
Use Each Item's Own Return Rate
Your dashboard gives every product the same refund rate. Your customers do not return them at the same rate. Put each product's real rate into the math. Your heroes may trade places overnight.
Give Store Credit, Not Cash Back
A cash refund hands back every dollar and ends the relationship. Store credit keeps the cash and starts the next order. The catch: make it one click easy and a little sweeter than cash.
Set Return Goals That Fit Your Products
A jewelry brand chasing a 2% refund rate is fighting gravity. Every category has a floor. Set your target from your category's real floor, or pay for the dream in lost sales and angry reviews.
Lever 3 of 6
Product Cost & Landed COGS
Check the Old Shipping Deal You Signed
You import products. An old shipping deal decides who pays for each leg of the trip. Check it once a year. You could claw back thousands, without changing your product, supplier, or price.
Check the Customs Code on Your Products
Every product you import carries a ten-digit customs code. That code sets the duty you pay on every shipment. Audit it once. You could get back tens of thousands a year on the same product.
Drop the Slow Half of Your Products
Your slow products look fine on a margin report. They are not. A 120-day audit shows which half of your catalog is tying up your cash, and how to set it free.
Put Your Money Behind the Winners
Most founders spread cash, stock, and ad money evenly while their five best products sell out. Rank the catalog once and move the money. A dollar behind a winner works three times harder.
Order Sooner to Skip Costly Air Shipping
Air freight costs five to ten times more than sea freight for the same box. Most brands do not choose it. Stockouts force it. Fix the reorder timing and the goods arrive for a fraction of the cost.
Do the Math Before You Order Stock
Two products can show the same healthy Gross Profit. Load all six costs and they meet opposite fates. Run a thirty-minute margin model before the order, while the loser is still a spreadsheet.
Lever 4 of 6
Sales Channel & Payment Fees
Use Your Store's Own Checkout
A checkout app can quietly add 2 to 3 cents to every dollar you sell. Unless the app earns that fee, switch back to your platform's own checkout. Some of the easiest money you will get back.
Ask for a Lower Fee When You Grow
The published 2.9% + 30c is a rack rate: the default for small accounts. Above real volume, your processor can quietly lower it, but they never offer first. One talk can be worth $45,000 a year.
Use Pay-Later Only When It Brings New Buyers
Buy Now Pay Later takes $5 to $6 of every $100 you sell, about double a card fee. The higher price is only worth paying on customers it truly brings you. Most stores never check.
See What Overseas Orders Really Cost
A cross-border card order does not pay your home processor rate. Hidden charges add 1 to 2.5 points on top, buried inside one blended fee line. Here is how to see them, and what to do next.
Check Your Card Fees Every Year
The good rate you negotiated two years ago is quietly higher today. Nothing jumped. Dozens of small fees crept. A two-week yearly re-bench pulls the rate back, usually without switching.
Three Ways to Lower Your Amazon Fee
Amazon takes $15 of each $100 you sell there. Most sellers file it under cost of doing business. But the referral fee is a set of rules, not one number, and three of them can move in your favor.
Lever 5 of 6
Shipping & 3PL
Use the Right Size Box
Carriers do not just charge for weight. They charge for space too. Put a light product in a big box and you get billed as if it were heavy. The right box can add $3 of profit to every order.
Check the Small Fees on Your Warehouse Bill
The big rate on your warehouse bill is not the problem. The long list of small fees below it is. They creep up every year and nobody reads them. A two-hour audit can claw back $2 an order.
Pack Items That Sell Together as One
Every line on an order is a separate pick fee at your warehouse. When the same three products keep selling together, one bundle turns three fees into one, adding $3 of profit to every trio order.
Find the Order Size That Loses Money
Shipping costs the same whether the cart holds one candle or four. On small carts, that flat fee eats the whole order and more. Find the cart size where you break even, then set your bar there.
Check Your Shipping Rates Every Year
Your carrier contract does not stand still. Rate cards rise, surcharges creep, discounts quietly end. A two-week re-bench with two rival quotes can win back $3 on every order.
Use Two Warehouses When You Get Big
Carriers price by distance. With one warehouse, half your orders cross the whole country at the top rate. At high volume, a second warehouse near your far customers pays for itself.
Lever 6 of 6
Advertising
See If Your Ads Really Make Money
Your agency says your ads earn 3.0x and calls it a win. On many stores, that same 3.0x loses money. Here is the five-minute math that tells you which one you are.
Stop Ads That Lose Money
Three of your campaigns lose money on every order, but they still show revenue on the dashboard, so cutting them feels like going backward. Here is the math that proves the cut is your fastest win.
Judge Your Two Kinds of Ads Apart
One blended ROAS number says your ads earn nothing. Split it in two and the truth comes out: a performance engine worth scaling, and a brand budget judged by the wrong yardstick.
Look at Ads and Discounts Together
Your ad campaign reports a win. Your discount promo reports a win. The same promo window loses money. Here is the one pool of dollars both levers feed on, and the math that tells the truth.
See the Real Cost of Your Amazon Ads
Amazon says your ads run at a 15% ACoS and the dashboard glows. But that number is measured against money you never keep. Load Amazon's fees and your costs, and it fades to three dollars an order.
Some Ads Pay Off on Repeat Orders
Some campaigns lose money on every first order and still make you money. Others just lose money. The difference is not the story your agency tells, it is the cohort math. Here is how to run it.
Collection 2 of 2
eCommerce Accounting Insights
The wider picture: tax, COGS, inventory, bookkeeping, valuation, and cash flow, told through real founder stories.
Gross Profit & Pricing
Gross Profit & Pricing
6 Gross Profit Mistakes That Could Be Killing Your eCommerce Business
Struggling to scale while juggling tight margins? How Peter's fresh food brand hit $500K revenue but ran at a loss, and the six mistakes to avoid.
Are You Charging Enough? Why Getting Your Gross Profit Margin Wrong Could Be Killing Your Brand
Strong sales, weak cash? One fashion brand hit $850K revenue but nearly collapsed, and understanding gross profit margin changed everything.
From Red Ink to Black: The Founder Who Rescued Her Gross Profit
Bleeding cash despite booming sales? Isabella's journey from 18% gross profit to 54%, and the seven data-driven steps that rescued her margins.
Eating Into Your Profits: The Candy Bar Mistake That Kills eCommerce Brands
A high-school candy hustle failed for the same reason many eCom brands burn out: eating your own profit. Learn from the mistakes.
COGS & Inventory
COGS & Inventory
How Incorrect COGS Calculations Cost an eCommerce Founder $84,000
Ignoring accurate landed costs can hurt your business. Caroline learned this when an accounting error led to $84,000 in overpaid fees and misguided decisions.
Unlocking True COGS: The Ultimate Guide for eCommerce Sellers
COGS is the make-or-break number hiding inside every order you ship. Most sellers guess it. Learn what counts, why it matters, and how to nail it.
GP Margin & Reorder Clock: Master Inventory for eCommerce Cash Flow
Running out of inventory is usually a gross profit issue, not just poor planning. This guide links GP, timing, and lead-time to keep cash flowing.
Shipping & Fulfillment
Shipping & Fulfillment
The Hidden Cost Trap: How Fulfillment and Warehousing Nearly Killed My Business
My margins looked great, until warehousing nearly bled the business dry. Slow-moving SKUs and flat 3PL fees crushed profits. Here is what to do before it is too late.
The Hidden Costs of Speed: Why John's Air Freight Addiction Is Sabotaging His Brand
John's skincare brand was flying off the shelves, but bleeding cash. The culprit? Air freight. How fast shipping crushed his margins and how planning saves thousands.
Why Bundles Could Be Saving Your Bacon: Maximize Your Pick and Pack Fees
Sandra moved volume on Amazon but still could not fund her next reorder. The fix was not more sales, it was selling smarter. See how she turned it around.
Discounts & Advertising
Discounts & Advertising
The Hidden Cost of Winning Sales: When Discounts Destroy Your Gross Profit
Peter was thrilled to hit $500K in revenue, until he realized he was losing money on every BOGO sale. How over-discounting kills profit, and what smarter promos look like.
Is a 4X ROAS Killing Your Business?
Is your ROAS as strong as you think? Many owners believe their ads work, but the reality can differ. Learn to measure ROAS accurately so you are not losing money on ads.
Tax
Tax
Don't Let VAT Sink Your UK Expansion
Huge opportunities await U.S. brands expanding into Europe. Do not let poor VAT planning derail your success. Prepare carefully to seize the growth.
The Tax Solution Every High-Growth eCommerce Seller Needs to Consider
High growth means big profits, and an even bigger tax bill. How Jim faced a tax dilemma with no cash to pay, and the strategy we used to manage his tax burden.
Bookkeeping & Accounting
Bookkeeping & Accounting
Are You Recognizing Shopify Revenue on the Wrong Date?
When should you count a sale as income? Learn how revenue recognition works for Shopify sellers, why the shipping date matters, and when order dates are fine.
How Accrual Accounting Helped Jim Reveal a Hidden $1.2M Profit
Cash basis is simple but misses crucial detail. See why accrual accounting gives a clearer picture, and how it revealed a hidden $1.2M profit for Jim.
Reduce Your eCommerce Accounting Costs: Pro Tips for Sellers
How do you get the best value from what you pay your accountant? What drives your accounting costs, and how to lower monthly fees while keeping the books accurate.
When a Blood Test Saves Your Business From Cardiac Arrest
I felt fine, then walked out of the doctor with a warning. Founders miss the same early signs in their financials. The metrics that save your business before it flatlines.
Growth, Exit & Cash Flow
Growth, Exit & Cash Flow
Boosting Your eCom Business Sale: The Power of Addbacks
We helped Tom find addbacks that lifted his valuation by over $1 million. These adjustments reveal real profitability and cash flow, and can maximize your sale value.
How to Break Free From the eCommerce Debt Trap
Leveraging debt to grow can be powerful, but many founders fall into a destructive debt trap that erodes profit. Here is how to avoid the eCommerce debt trap.
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