Gumroad developer guides

Practical, code-first guides for people who sell software, code and communities on Gumroad. Each one covers a gotcha in Gumroad’s API that most setups miss.

Launch week: code LAUNCH30 takes 30% off every paid kit and the all-kits bundle until October 26, 2026.

Free tools

• Gumroad fee calculator: see what you keep on direct and Discover sales, and the price you need for a target payout
• Gumroad bundle & discount calculator: price a bundle or offer code and compare your payout with selling each product separately
• Gumroad license key checker: see if a key is valid, refunded, charged back or from an ended subscription, without using up an activation
• Gumroad sales CSV analyzer: open your sales export and see gross, refunds, fees and net by product, month, referrer and country, right in your browser
• Etsy fee & profit calculator: every Etsy fee on an order (listing, 6.5% transaction, payment processing, Offsite Ads), your profit and margin, and the price you need for a target margin
• Freelance hourly rate calculator: the hourly rate, day rate and monthly revenue you need to take home your target income after tax, costs and unbilled time
• Invoice late fee & payment terms calculator: due date, days late, late fee or interest and total due for Net 7 to Net 60 terms, plus the real cost of skipping a 2/10 Net 30 discount
• Quarterly estimated tax calculator for freelancers (2026): self-employment and income tax, the % of each payment to set aside, your four quarterly payments, the safe-harbor minimum and the 2026 due dates
• PayPal & Stripe fee calculator (2026): the fee, payout and effective rate for Stripe and every PayPal payment type, and the price to charge to net a set amount
• Seller fee comparison calculator (2026): what you keep on Gumroad, Payhip, Ko-fi, Lemon Squeezy, Paddle, Polar, Etsy, Stripe and PayPal, sorted by net, plus the price to keep a target amount
• Self-employed per diem meal deduction calculator (2026): the IRS standard meal allowance for any US city and travel dates, with the 3/4 first/last day rule and the 50% deductible amount
• GSA per diem calculator (2026): lodging maximum per night and M&IE for any US city and trip dates, with 75% first and last days and deductions for meals provided
• 2026 mileage deduction calculator: business, medical, moving and charity miles priced by date at the split-year IRS rates (72.5 cents to June 30, 76 cents from July 1), with a paste-in trip log
• Home office deduction calculator: simplified $5 per sq ft (up to 300 sq ft) vs the regular Form 8829 method side by side, with depreciation, the income limit and carryovers
• SEP IRA vs Solo 401(k) calculator (2026): the most a freelancer or sole proprietor can contribute to each plan, with self-employment tax, the 20% employer limit, the $24,500 deferral, age 50+ and 60-63 catch-ups and the $72,000 cap
• Self-employment tax calculator (2026): Social Security tax up to the $184,500 wage base (less any W-2 wages), 2.9% Medicare, the 0.9% Additional Medicare Tax by filing status, the deductible half and the quarterly share

Guides

• Block refunded and charged-back buyers in your Gumroad license check (Node and Python)
• Sell access to a private GitHub repo on Gumroad: invite on sale, remove on refund
• Get Gumroad sale alerts in Discord, Slack or Telegram
• Sell a paid Discord on Gumroad and revoke roles on refund
• Gumroad fees in 2026, explained: what you keep on a $5, $19 and $49 sale, and how to price around the fee
• Gumroad 1099-K and taxes: reconcile gross sales, fees and refunds for Schedule C
• Gumroad vs Lemon Squeezy vs Polar vs Paddle: fees in 2026 and what you keep on a $9, $29 and $99 sale
• Sync Gumroad sales to Google Sheets automatically: a free Apps Script that keeps refunds up to date
• Gumroad Ping (webhook) reference: every field, refund and cancellation events, retries, and verifying unsigned pings (Node and Python)
• Etsy fees explained (2026): listing, transaction, processing and Offsite Ads fees for US sellers, with worked examples
• What to include on a freelance invoice (2026 checklist): every field a freelance invoice needs, payment terms and late fees, with a sample invoice
• PayPal & Stripe fees explained (2026): every US rate, worked examples, a comparison table and how to price to net a set amount
• Gumroad vs Etsy vs Stripe vs PayPal vs Shopify fees (2026): selling digital products, side by side, with what you keep on a $10, $25 and $50 sale
• Gumroad alternatives: Payhip vs Sellfy vs SendOwl (2026): fees, plan limits and the real monthly cost at $500 and $3,000 a month in sales
• Kit vs beehiiv vs MailerLite for creators (2026): free tiers, paid plans and selling fees compared
• Freelance invoicing software: FreshBooks vs Bonsai vs HoneyBook vs Wave (2026): plan prices and card/bank fees, with a $3,000/month example
• Teachable vs Podia vs Payhip vs Gumroad: where to sell an online course: plan prices, platform and card fees, and the monthly cost at $500 and $3,000 in course sales
• systeme.io vs Kit vs Payhip free plans (2026): the cheapest $0-a-month plan for selling your first digital product, with the cost at $500 and $3,000 a month
• Sell digital downloads from your own website: SendOwl vs Payhip vs Sellfy vs systeme.io: checkout and delivery tools for your own site, with the cost at $500 and $3,000 a month
• Bookkeeping for digital product sellers: Wave vs QuickBooks Solopreneur vs a spreadsheet: what each plan includes, why Gumroad payouts confuse bank-feed bookkeeping, and the year-one cost of each
• When do you get paid? Payout timing on Gumroad, Payhip, Etsy, Lemon Squeezy and Sellfy: payout schedules, holds, minimums and payout fees, with one sale traced to the bank on each platform
• Who collects sales tax and VAT on digital products? Gumroad, Lemon Squeezy, Payhip, Sellfy and Etsy: merchant of record or not, who charges and pays the tax, with one $20 sale to Germany, the UK and Pennsylvania
• Refunds and chargebacks on digital products: what they cost on Gumroad, Lemon Squeezy, Payhip, Sellfy and Etsy: who issues the refund, which fees come back, and what a lost chargeback costs on a $20 sale
• Delivering digital files: file limits, download limits, PDF stamping and license keys on Gumroad, Lemon Squeezy, Payhip, Sellfy and Etsy: file size and download limits, PDF stamping, license keys, and whether past buyers get your updates
• Discount codes and sales on Gumroad, Lemon Squeezy, Payhip, Sellfy and Etsy: coupons, limits, fees and pay what you want: how codes, timed sales, bundles and pay what you want work on each, and what a 25% off code on a $20 product costs you
• Marketplace discovery and what it costs: Gumroad Discover, Etsy search and Offsite Ads, and the Payhip, Lemon Squeezy and Sellfy options (2026): which platforms bring you buyers, what a marketplace or ad sale costs against your own link, and how to get listed

Free code

• gumroad-license-check: zero-dependency, refund-aware license check for Node and Python (MIT)
• Awesome Gumroad: a curated list of open-source tools and libraries for building on Gumroad

Paid kits

• Gumroad License Kit: offline cache, activation limits, proxy server, Node/Python/Electron snippets
• Gumroad → GitHub Access Kit: sell private repo access with automatic invites and removal
• Gumroad → Discord Access Kit: roles from license keys, removed on refund
• Gumroad Ping Relay: verified sale alerts to Discord, Slack and Telegram
• Gumroad Sales Dashboard Kit and Seller Finance Tracker: reports and P&L
• Everything in one bundle

Not affiliated with Gumroad, GitHub or Discord.