All pricing & margin, latest first.
The salon service pricing formula: stop guessing, start building prices
Most salon owners price by what the competitor down the street charges. That is not pricing — that is hoping. This is the formula that builds every menu price from the four costs underneath it, with worked numbers, a 90-minute colour example, and the eight signals that say it is time to raise.
Ibrahim Ölmez
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25 May
Return on ad spend mastery: what ROAS actually means, what good looks like, and why most owners chase the wrong number
ROAS is the most-googled DTC metric for a reason — it is the simplest acquisition number to compute and the easiest to misuse. A 4x ROAS sounds good until you realise your gross margin is 30% and you needed 3.33x just to break even. This is the full ROAS guide: the formula, the break-even math, the eight worked thresholds by margin, ROAS vs MER vs PROAS, the iOS 14.5 break, channel benchmarks, and the daily reconciliation against your bank.
Ibrahim Ölmez
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25 May
Restaurant prime cost mastery: the one number that decides whether your restaurant has a future
Prime cost — food + beverage COGS plus fully-loaded labor — is the single number that tells you whether your restaurant has a future. If you don't know yesterday's prime cost, you can't fix today's. This is the full playbook: the benchmark by service type, the 60-second daily calc, a worked 50-cover bistro example, the diagnostic order when prime cost creeps up, and a 30-day reset.
Ibrahim Ölmez
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25 May
Open-to-buy formula: the merchant-planning playbook for independent boutiques
Open-to-buy (OTB) is the planning tool that tells you exactly how much new stock you can purchase in any given month without choking on inventory. Big-box retailers run it as religion. Most independent boutiques have never been taught it. The full playbook — the formula, the worked example through a Vienna boutique's March plan, planned sales math, planned EOM inventory math, planned markdowns, by-category breakdown, mid-month adjustments, supplier-terms angle, and seven FAQs.
Ibrahim Ölmez
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25 May
The attribution window myth: why Meta says 8x ROAS while your bank account stays flat
Meta says you got 8.4x ROAS this week. Your bank shows you broke even. Both are accurate; only one is useful. Here is what attribution windows actually do, the five ways they overstate ad performance, the 14-day pause test that exposes the truth, and the single math that does not lie.
Ibrahim Ölmez
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25 May
Customer acquisition cost for ecommerce: the operator-grade CAC playbook for Shopify and DTC
Meta says your CAC is €18. Your bank says it is closer to €54 once you add the agency, the creative, the returns, and the customers you also paid Google to acquire. CAC is the single number that decides whether scaling pays back or burns cash — and most Shopify owners are working from a platform-reported version that hides 40-60% of the real cost. Here is the full CAC formula, channel-by-channel benchmarks, the CAC:CLV ratio table, the payback period math, and the five levers that actually lower it.
Ibrahim Ölmez
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25 May
How to price a cafe menu: the full playbook for owners who actually run the till
Cafe menu pricing is part math, part street-read, part nerve. Most owners set prices by vibes and lose 4-7 points of margin to it. This is the full playbook — cost-up math, market read, positioning, a 12-item worked matrix, when to raise, and how to raise without losing regulars.
Ibrahim Ölmez
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25 May
Boutique inventory turnover: the definitive playbook for small retail owners
Most boutique owners obsess over revenue. The number that actually predicts whether the shop survives the year is inventory turnover — how many times your stock sells through itself annually. The full playbook, with category benchmarks, GMROI, the 30/60/90 markdown ladder, and the math worked end-to-end.
Ibrahim Ölmez
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25 May
Why is my cafe not making money? 7 reasons and the fix for each
If your café is busy and the bank balance still isn't moving, the cause is almost always one of seven specific structural problems. Here is the math behind each, the warning percentages, and what to actually do — with nouz handling the daily numbers so you spot the leak before it becomes a quarter.
Ibrahim Ölmez
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24 May
Stripe fees and your daily profit: how much you're really losing (with calculator)
Stripe's standard European card rate quietly eats 1.5-2.5% of every card sale. On a typical small shop, that's a four-figure hole in annual EBIT — and most owners never see it because the fee is deducted from the payout before it reaches the bank. The exact math, by daily revenue scenario, with a free calculator.
Ibrahim Ölmez
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24 May
Salon no-show policy: how much money you're losing and how to fix it
An 8% no-show rate at a 5-chair salon quietly bleeds €18-30k a year. Here's the exact math, why a chair-hour is the worst kind of inventory to lose, and four policy interventions ranked by friction and impact.
Ibrahim Ölmez
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24 May
Salon losing money despite full appointments: the 4 leaks
Your appointment book is full and your bank account is flat. That contradiction has four specific causes — and a 3-chair Munich salon at €18k/month gross is the worked example for all of them.
Ibrahim Ölmez
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24 May
Retail dead stock: how to spot it before it kills your margin
Dead stock is the inventory sitting on your shelves that hasn't sold in 90+ days and probably never will at full price. If 15% of your stock is dead, your real margin is 6-12 points lower than your books say. Three spot tests, the markdown cascade, and the reorder discipline that fixes it — with the math.
Ibrahim Ölmez
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24 May
My Shopify store is not profitable: a margin diagnostic for owners doing real revenue
If your Shopify dashboard shows healthy sales but your bank account stays flat, six hidden costs are eating the gap. Here's the diagnostic, the math, and the fix for each — sized for stores doing €10k, €30k, and €60k a month.
Ibrahim Ölmez
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24 May
My retail store is losing money: a step-by-step margin diagnostic
If sales are steady but the bank account keeps shrinking, the leak is almost always one of six places. A diagnostic for small retail boutiques — with the test for each and the fix for each, worked through a real €40k/month Berlin shop.
Ibrahim Ölmez
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24 May
Break-even AOV for ecommerce: the order value your store needs to stop bleeding
Most Shopify owners don't know their break-even AOV. They just keep pushing add-to-cart and praying. Here is the formula, a worked solo-store example, the three levers to fix it when you are below break-even, and how to make it visible by close of day.
Ibrahim Ölmez
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24 May
Customer lifetime value for ecommerce: the honest CLV math for Shopify owners
If you are paying €40 to acquire a customer who buys once for €55 and disappears, you are not running a store — you are running a discount program for strangers. CLV is the number that tells you whether to keep buying ads, switch to retention, or fix the product. Here is how to compute it without a data team, with worked Shopify examples and the lever table.
Ibrahim Ölmez
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24 May
Cafe daily prime cost: the one number every cafe owner should track
Prime cost — food plus labor — is the single number that decides whether your cafe makes money. Healthy is 55-65% of net revenue. Above 70% is structural. Here is how to compute it daily, what the fixes are, and a worked Vienna example.
Ibrahim Ölmez
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24 May
Pricing the croissant: a margin walkthrough you can copy in 12 minutes
From bag-of-flour cost to till receipt — exactly how to land on a price that pays for itself, the oven, and the morning shift. Worked example with real numbers from a Berlin bakery on nouz.
Ibrahim Ölmez
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07 May
How to price a haircut: the four-input formula salons under-use
Chair time × stylist rate + product COGS + overhead slice, then a margin target. Most salons price on instinct and miss two of the four inputs. Worked example with real numbers — and a copy-paste pricing ladder for a four-chair boutique salon.
Ibrahim Ölmez
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29 Apr
The Shopify true-margin calculator: what's left after fees, refunds and shipping
Shopify reports show gross sales. EBIT lives three deductions further down. Here's the line-by-line walk from order total to true per-order margin, with a worked example and the seven leak points most stores under-count.
Ibrahim Ölmez
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19 Apr
The retail markup formula owner-operators actually use (not 3x cost)
The "keystone" 2x markup is a relic from department stores in the 1950s. Real owner-operator retail in 2026 runs on a four-layer markup formula that accounts for category turnover, shrink, markdown allowance and target margin. Worked example with a knitwear shop.
Ibrahim Ölmez
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07 Apr
How shipping costs quietly eat your e-commerce margin (and the threshold maths)
On a €40 average order, every €1 of unrecovered shipping is 2,5 percentage points of EBIT margin. The "free shipping over €50" promise is sometimes the most expensive marketing decision a small store makes. Here's how to model the threshold properly.
Ibrahim Ölmez
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24 Mar
The 90-day menu-engineering quadrant: stars, dogs, plowhorses, puzzles
Plot every menu item on two axes — popularity and contribution margin — and you get four quadrants that tell you exactly what to promote, kill, reprice or rebuild. Here's the 90-day routine, the quadrant maths, and how to read the chart in 30 seconds.
Ibrahim Ölmez
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13 Mar
Service-line pricing for boutique salons: cuts, colour, blow-dries and the bundle
A boutique salon usually offers 12-20 distinct services across three stylist tiers. Pricing each one consistently — and pricing the bundle so it pulls — is the difference between a healthy 22% margin and a quiet 8% one. Here's the full service-line ladder.
Ibrahim Ölmez
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28 Feb
Subscription pricing economics: when bag 3 is the only one that pays
A coffee subscription, a wine club, a soap-of-the-month — every recurring product runs on the same unit economics. The first bag usually loses money on acquisition. The second covers the cost to serve. Only the third onwards is profit. Here's the maths.
Ibrahim Ölmez
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14 Feb
The true cost of a discount code: why "20% off" cuts your margin in half
A 20% off code feels generous to the customer and small to the owner. Run the math: on a 40% gross margin item, a 20% discount cuts your gross profit per sale by 50%. To break even on margin you would need to double unit volume — and most promotions deliver 10-25% lift, not 100%. Here is the discount-margin table for cafes, retail, salons, and ecommerce, four worked examples, and the four cases where discounts genuinely make sense.
Ibrahim Ölmez
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30 Jan
Bundle pricing without bleeding margin: the gift-set maths
A gift bundle reads as a discount to the customer, but priced from the cost stack it can be margin-accretive — fewer transactions, lower packaging cost per unit, shared shipping. Here's the maths that turns a "save 15%" headline into a +6-point margin lift.
Ibrahim Ölmez
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18 Dec