Nummbas Blog

Guides and insights for direct-to-consumer business owners who want to understand their numbers.

Ecommerce accounting softwareTriple Whale alternativesEcommerce analyticsAmazon profit marginROAS guideQ3 cash runway

Q3 Cash Runway Plan: How Much Can You Spend on Ads, Inventory, and Owner Pay?

Plan Q3 ecommerce spend around cash runway. Learn how much you can afford for ads, inventory, owner pay, and operating costs without creating a cash crunch.

8 min readGuides

The Mid-Year DTC Financial Review: 10 Numbers to Check Before Q3

Use this mid-year financial review to check profit, cash runway, inventory, ad spend, returns, owner pay, and Q3 readiness for your DTC brand.

8 min readGuides

Digital Wallets, Payment Fees, and Checkout: What Faster Checkout Really Costs

Faster checkout can improve conversion, but payment methods carry costs. Learn how to track digital wallet fees, payment mix, and checkout profitability.

7 min readGuides

Social Commerce Profitability: How to Measure TikTok, Instagram, and Creator Sales Properly

Social commerce can drive revenue, but profitability depends on fees, discounts, returns, creator costs, and fulfillment. Learn what to track.

7 min readEcommerce Insights

The Inventory Cash Trap: Why Bestsellers Can Still Create a Cash Crunch

Inventory can make a growing ecommerce brand cash-poor. Learn how to measure stock cover, reorder timing, cash tied in inventory, and profitable sell-through.

8 min readEcommerce Insights

Discount Math for Ecommerce: When a Sale Makes You Money and When It Burns Cash

Discounts can grow revenue while shrinking profit. Learn how to calculate discount break-even, protect margin, and decide when a sale is worth running.

8 min readGuides

AI Shopping Is Changing Product Discovery: What Ecommerce Brands Need to Track Now

AI shopping experiences are changing how customers find products. Learn what ecommerce brands should track across feeds, pricing, margin, availability, and product data.

8 min readEcommerce Insights

Returns Are a Profit Line Item: How to Measure the Real Cost of Refunds and Exchanges

Returns are not just a customer service issue. Learn how to calculate the true cost of ecommerce returns and use return data to protect product margin.

8 min readEcommerce Insights

Shipping Costs Are Moving Again: How to Protect Margin Without Killing Conversion

Shipping costs and carrier surcharges can quietly reduce ecommerce profit. Learn how to set free shipping thresholds, recover costs, and protect contribution margin.

8 min readGuides

Landed Cost for Ecommerce: Tariffs, Duties, Freight, and the Margin Math Brands Miss

Landed cost is the true cost of getting a product ready to sell. Learn how tariffs, duties, freight, packaging, and fees change ecommerce margins in 2026.

8 min readGuides

2026 Ecommerce Mid-Year Check: Why Sales Growth Is Not the Same as Profit

Ecommerce sales are still growing in 2026, but growth does not guarantee profit. Use this mid-year check to review margins, cash, returns, ad spend, and inventory before Q3.

9 min readEcommerce Insights

Ecommerce ROI: Formula, Return on Investment, and Tracking

Ecommerce return on investment shows whether your store earns profit after all costs. Learn the ROI formula, what to include, and how to track it.

11 min readGuides

Shopify Profit Margin Calculator (2026)

Most Shopify stores keep 10 to 20 percent net profit after all costs. Use this guide to calculate your real profit margin per product and per order with step-by-step examples.

11 min readGuides

ROAS vs ROI: What Each Metric Tells You

ROAS measures ad revenue per dollar spent. ROI measures total profit after all costs. Learn when to use each, see a worked example, and understand why you need both.

10 min readGuides

How to Increase ROAS: 10 Proven Methods

Learn how to increase ROAS with 10 proven methods for Meta Ads, Google Ads, and TikTok Ads. Actionable tactics to get more revenue from every dollar of ad spend.

12 min readGuides

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