HustleNumbers

65 guides · every one paired with a free calculator

Articles & Guides

The math behind freelancing and selling — fees, rates, cash flow, and pricing — explained with real numbers and a calculator at the end of each one. Estimates only; not financial or tax advice.

Pricing & Productivity · Featured

Lost Money to Scope Creep? Here's How to Calculate and Bill for Extra Work

Scope creep adds 15–25% unplanned hours on fixed-price projects. Learn the change order formula, see real dollar examples, and get a free calculator.

· 7 min readRead the full breakdown →

Latest

Pricing & Productivity · 7 minHow Much to Charge for Social Media Management: Monthly Retainer CalculatorSocial media management retainers range $500–$8,000/mo in 2026. Calculate yours from hourly effort, platform count, and scope — with a free retainer pricing tool. Pricing & Productivity · 7 minHow Much Should a Freelance Bookkeeper Charge Per Hour in 2026? (Real Numbers)Freelance bookkeeper rates in 2026 range $40–$75/hr. See how certification, software expertise, and service type change your rate — with a floor-price formula. Marketplace Fees · 7 minEtsy Offsite Ads: How to Opt Out, What It Actually Costs You, and When It's Worth Keeping OnEtsy Offsite Ads charge 15% on attributed sales. Opt out via Shop Manager > Settings > Offsite Ads (under $10K only). Break-even: if ads bring 1 extra sale per 7 clicks and your margin is 60%, the fee pays for itself. Marketplace Fees · 6 minAmazon Clothing Referral Fees: 3 Tiers Most Sellers Don't Know About (5%/10%/17%)Amazon clothing referral fees use 3 tiers: 5% on the first $15, 10% on $15–$20, 17% above $20. A $25 shirt pays $2.10 (8.4% effective), not the '15% flat' most articles claim. Marketplace Fees · 7 minAmazon FBA Fee Increases 2026: $0.08/Unit + New 3.5% Surcharge ExplainedAmazon raised FBA fees $0.08/unit in Jan 2026 and added a 3.5% fuel/inflation surcharge in April. On 1,000 units/month, that's $2,100/year in new costs. Here's the full breakdown. Marketplace Fees · 6 minAmazon Individual vs Professional Plan: The Exact Break-Even Is 41 Items/MonthAmazon Individual charges $0.99/item, Professional costs $39.99/month. Break-even: 40.4 items. At 41+ items/month, Professional saves money. At 20 items, Individual saves $20.19.

Pricing & Productivity 21

Pricing & Productivity · 7 minLost Money to Scope Creep? Here's How to Calculate and Bill for Extra WorkScope creep adds 15–25% unplanned hours on fixed-price projects. Learn the change order formula, see real dollar examples, and get a free calculator. Pricing & Productivity · 7 minHow Much to Charge for Social Media Management: Monthly Retainer CalculatorSocial media management retainers range $500–$8,000/mo in 2026. Calculate yours from hourly effort, platform count, and scope — with a free retainer pricing tool. Pricing & Productivity · 7 minHow Much Should a Freelance Bookkeeper Charge Per Hour in 2026? (Real Numbers)Freelance bookkeeper rates in 2026 range $40–$75/hr. See how certification, software expertise, and service type change your rate — with a floor-price formula. Pricing & Productivity · 6 minWhat Scope Creep Actually Costs on a $3,000 Fixed-Fee ProjectSee how 10 extra unpaid hours on a fixed-fee project crush your effective hourly rate — with real math and a free scope creep calculator. Pricing & Productivity · 5 minAgency Markup on Contractors ExplainedBuild billable rates from direct cost, overhead, and profit markup on pass-through work. Pricing & Productivity · 5 minHow to Calculate Billable Hours and UtilizationMeasure billable vs total hours, utilization %, and effective hourly rate. Free browser calculator. Pricing & Productivity · 5 minThe Cost of Scope Creep on Fixed FeesSee how unbilled extra hours crush your effective rate on a fixed-fee project. Free calculator. Pricing & Productivity · 5 minCost-Plus Pricing ExplainedSet a selling price from costs plus a target margin on price. Free cost-plus calculator. Pricing & Productivity · 5 minFreelance Capacity PlanningCompare weekly max hours to client commitments and see utilization before you say yes. Pricing & Productivity · 5 minFreelance Day Rate Calculator ExplainedConvert an hourly rate into day, half-day, and weekly rates. Free browser calculator. Pricing & Productivity · 5 minHow Much Does a Meeting Cost?Estimate the loaded cost of a meeting from attendees, hourly rate, and duration. Free calculator. Pricing & Productivity · 5 minHow to Price a Freelance ProjectPrice a fixed-scope project from hours, rate, complexity, buffer, and profit uplift. Free calculator. Pricing & Productivity · 5 minHow to Price a Monthly RetainerTurn committed hours and an hourly rate into a monthly retainer with optional discount. Pricing & Productivity · 5 minHow to Set Consulting FeesBuild consulting fees from salary, benefits, overhead, and profit multiplier. Compare to the 3x rule. Pricing & Productivity · 5 minInvoice Late Fee Calculator ExplainedEstimate simple-interest or flat late fees on overdue invoices. Educational math; confirm contract and local law. Pricing & Productivity · 5 minNet 30 Cash Flow Impact ExplainedSee how Net 30 and longer payment terms tie up cash from monthly invoicing. Free browser calculator. Pricing & Productivity · 5 minShould You Raise Your Freelance Rate?Model the income impact of a rate increase and how many clients you could lose and still break even. Pricing & Productivity · 5 minTime to Money: Break-Even ExplainedLearn how long an upfront investment takes to pay back from net monthly income. Free break-even calculator. Pricing & Productivity · 5 minValue-Based Pricing for FreelancersAnchor your fee to client value captured, not just hours. Free value-based pricing calculator. Pricing & Productivity · 5 minHow to Calculate Your Freelance Hourly RateTurn salary goals, business expenses, and realistic billable hours into a sustainable freelance hourly rate. Free calculator. Pricing & Productivity · 5 minProfit Margin vs Markup (With Examples)Learn why profit margin and markup are different percentages. Convert cost and price instantly with a free calculator.

Marketplace Fees 29

Marketplace Fees · 7 minEtsy Offsite Ads: How to Opt Out, What It Actually Costs You, and When It's Worth Keeping OnEtsy Offsite Ads charge 15% on attributed sales. Opt out via Shop Manager > Settings > Offsite Ads (under $10K only). Break-even: if ads bring 1 extra sale per 7 clicks and your margin is 60%, the fee pays for itself. Marketplace Fees · 6 minAmazon Clothing Referral Fees: 3 Tiers Most Sellers Don't Know About (5%/10%/17%)Amazon clothing referral fees use 3 tiers: 5% on the first $15, 10% on $15–$20, 17% above $20. A $25 shirt pays $2.10 (8.4% effective), not the '15% flat' most articles claim. Marketplace Fees · 7 minAmazon FBA Fee Increases 2026: $0.08/Unit + New 3.5% Surcharge ExplainedAmazon raised FBA fees $0.08/unit in Jan 2026 and added a 3.5% fuel/inflation surcharge in April. On 1,000 units/month, that's $2,100/year in new costs. Here's the full breakdown. Marketplace Fees · 6 minAmazon Individual vs Professional Plan: The Exact Break-Even Is 41 Items/MonthAmazon Individual charges $0.99/item, Professional costs $39.99/month. Break-even: 40.4 items. At 41+ items/month, Professional saves money. At 20 items, Individual saves $20.19. Marketplace Fees · 6 minAmazon's $10 Referral Fee Threshold: 8% vs 15% — Should You Price Below It?Amazon charges 8% referral on items ≤$10 vs 15% above. A $9.99 item pays $0.80 vs $10.01 pays $1.50 — a $0.70 cliff. Here's when pricing below $10 makes sense. Marketplace Fees · 5 minYes, eBay Charges Fees on Shipping — Here's How Much It Actually Costs YouDoes eBay charge fees on shipping cost? Yes. The 13.25% final-value fee applies to item price + shipping. On $40 + $8 shipping, that extra $8 costs you $1.06 in fees. Marketplace Fees · 5 minHow Much Does eBay Take From a $100 Sale? (Real Fee Breakdown 2026)How much does eBay take from a $100 sale? Final-value fee is 13.25% + $0.30 per order = $13.55. With $10 shipping, total fees hit $14.88. See the full breakdown. Marketplace Fees · 6 minSelling on eBay for $50? Here's Exactly What You'll Pocket After All FeesOn a $50 eBay sale with $7 shipping, eBay takes $7.85 in fees (13.25% of $57 + $0.30). After $15 cost and shipping, you pocket $27.15. Full breakdown with calculator. Marketplace Fees · 5 mineBay Charges Final Value Fee on Sales Tax You Never Keep (2026 Update)eBay final value fee on sales tax: eBay collects tax for you but still charges 13.25% FVF on it. On a $100 item with 8% tax, that $8 you never keep costs you $1.06. Marketplace Fees · 7 mineBay's New 'Any-Click' Promoted Listings Fee: What Changed in January 2026eBay switched Promoted Listings Standard from last-click to any-click attribution on Jan 13, 2026. Now any purchase within 30 days of an ad click triggers the fee. Here's what that means for your margins. Marketplace Fees · 7 mineBay Sneaker Fees: Why Selling Over $150 Actually Saves You Money (8% Rate)eBay charges just 8% FVF on sneakers over $150 (vs. 13.25% standard) through Authenticity Guarantee. On a $300 pair, that's $15.75 saved. Here's the full fee breakdown with worked examples. Marketplace Fees · 7 mineBay Trading Card Fees in 2026: 13.25% + What Most Sellers MissTrading cards on eBay fall under Collectibles at 13.25% + $0.30/order. But cards over $250 trigger Authenticity Guarantee, and thin-margin flips need tight fee math. Worked examples inside. Marketplace Fees · 7 minEtsy Digital Download Fees in 2026: Same Rates, Better Margins (Here's Why)Digital and physical items pay the same Etsy fee rates — but digital wins on margins because there's no shipping cost. See the real math on a $15 item. Marketplace Fees · 5 minHow Much Does Etsy Take From a $25 Digital Download?Break down Etsy listing, transaction, and processing fees on a $25 digital item — then estimate your real take-home with a free calculator. Marketplace Fees · 6 minEtsy Charges 6.5% on Shipping AND Gift Wrap — Calculate Your Real FeesEtsy's 6.5% transaction fee applies to item price + shipping + gift wrap. See exactly how much that costs on a real order and calculate your own. Marketplace Fees · 7 minEtsy Offsite Ads: When They Become Mandatory at $10K (And How to Opt Out Below)Etsy Offsite Ads charge 15% (or 12% over $10K). Learn when they become mandatory, how to opt out below the threshold, and what the fee does to your margin. Marketplace Fees · 7 minSelling $5-$10 Items on Etsy? Here's What You Actually Keep After FeesOn a $5 item, Etsy takes 18.6% in fees. On $10, it's 14%. See the real math on low-price selling and whether it's worth your time. Marketplace Fees · 7 minEtsy vs eBay Fees in 2026: Side-by-Side Calculator (9.5% vs 13.6%)On a $30 item, Etsy charges $3.30 (11% all-in) vs eBay's $4.28 (14.3%). Etsy is cheaper per sale, but $0.20 listing fees on unsold items add up. Full breakdown with real numbers. Marketplace Fees · 6 minHow Much Does eBay Take When You Offer Free Shipping?See how eBay final-value fees apply to sale price plus shipping when you offer free shipping — with a worked $45 example and free calculator. Marketplace Fees · 7 minMercari's 2025 Fee Overhaul: Flat 10% Seller Fee Explained (Old vs. New)Mercari replaced 10% + 2.9%/$0.50 with a flat 10% seller fee on Jan 6, 2025. See old vs. new math on a $30 item and find out if you save money. Marketplace Fees · 7 minMercari vs eBay for Clothes Under $20: Which Platform Keeps You More Money?On a $15 clothing item, Mercari takes $1.50 (10%) vs eBay's $2.29 (13.25% + $0.30). See the full fee math, shipping traps, and when eBay's traffic wins. Marketplace Fees · 7 minMercari vs Poshmark Fees: The $15 Crossover Point That Changes EverythingPoshmark takes $2.95 flat under $15 and 20% above. Mercari takes flat 10% always. See why Poshmark eats 29.5% of a $10 sale and where the crossover hits. Marketplace Fees · 7 minStripe vs PayPal vs Square for Marketplace Sellers: Stacked Fee Comparison 2026On $100: Stripe $3.20, PayPal $3.48, Square $3.20. PayPal's $0.49 fixed fee hurts small orders. For marketplace sellers stacking platform + processor fees, the difference compounds fast. Marketplace Fees · 5 minAmazon Referral Fees ExplainedUnderstand Amazon category referral fees and estimate payout. FBA intentionally excluded until separately verified. Marketplace Fees · 5 mineBay vs Etsy vs Mercari Fees ComparedCompare eBay, Etsy, and Mercari seller fees on the same sale price, shipping, and cost. Free side-by-side calculator. Marketplace Fees · 5 minHow Much Does eBay Take From a Sale?Estimate eBay final-value and per-order fees, then see net profit before you list. Free calculator, verified fee table, nothing uploaded. Marketplace Fees · 5 minHow Much Does Etsy Take From Sellers?Break down Etsy listing, transaction, and payment-processing fees, then estimate take-home with a free browser calculator. Marketplace Fees · 5 minMercari Seller Fees: What You KeepEstimate Mercari seller fees and net payout before you list. Free calculator with a verified seller fee table. Marketplace Fees · 5 minStripe vs PayPal vs Square Fees ComparedCompare Stripe, PayPal, and Square processing fees on one invoice amount. Free calculator with verified published rates.

Shipping & Travel 2

Shipping & Travel · 5 minGSA Per Diem Explained (CONUS Lodging + M&IE)GSA CONUS per diem by ZIP or city: seasonal lodging, M&IE tiers, and 75% first/last travel days. Free browser calculator. Shipping & Travel · 5 minUSPS Priority Mail Flat Rate Box PricesCompare USPS flat-rate envelope and box prices: online commercial vs Post Office retail. Verified lookup, nothing uploaded.

Personal Finance 10

Personal Finance · 5 minThe 50/30/20 Budget Rule ExplainedSplit take-home income into needs, wants, and savings with a free 50/30/20 calculator. Personal Finance · 5 minHow to Budget Irregular IncomeUse percentile baselines and spending tiers when monthly income swings. Free planner. Personal Finance · 5 minHow to Calculate Business RunwayEstimate how many months cash lasts at your net burn rate. Free business runway calculator. Personal Finance · 5 minDebt Snowball vs Avalanche (With a Calculator)Compare snowball and avalanche payoff plans: months, interest, and which method fits your motivation. Personal Finance · 5 minFIRE Number and the 4% Rule ExplainedEstimate your financial independence number and timeline with a free FIRE calculator. Personal Finance · 5 minIncome Smoothing for FreelancersTurn lumpy freelance income into a steadier monthly paycheck with a buffer. Free calculator. Personal Finance · 5 minHow Much Emergency Fund Do You Need?Size a 6-month emergency fund target and see if your savings plan is on track. Free calculator. Personal Finance · 5 minHow to Calculate Net WorthAssets minus liabilities, plus debt-to-asset ratio. Free net worth calculator in your browser. Personal Finance · 5 minSavings Goal: Monthly Contribution ExplainedFind the monthly contribution to hit a savings goal on your timeline. Free calculator. Personal Finance · 5 minWhat Are Sinking Funds? (And How to Fund Them)Set aside monthly amounts for known future expenses with a free sinking funds planner.

Generators 3

Generators · 5 minFree Invoice Generator (No Sign-Up)Create invoices with live preview and save PDF via browser print. Qty × rate lines, discount, tax. Nothing uploaded. Generators · 5 minFree Freelance Quote GeneratorBuild quotes with fixed scope line prices, tax, and deposit %. Live preview, print-to-PDF, no sign-up. Generators · 5 minFreelance Rate Card Template (Free)One-page service rate card with live preview. Save PDF via browser print. Free, no account.