Guide · 6 min read
Client invoices, Substack payouts, royalties, and deductions — clean books for writers who'd rather be writing.
A typical full-time writer has 4+ income streams: direct clients, content platforms (Medium, Substack), affiliate links, royalties, and one-off speaking or course income. Without separation, you can't tell which work is actually paying.
All client checks, Stripe/PayPal payouts, Substack deposits go to one checking. One credit card for subscriptions (Grammarly, hosting, Notion, ChatGPT, books).
Use simple invoices with payment terms. When money lands, tag it: client name + project. End of year, you'll know your top-3 clients by revenue, hours, and margin.
The recurring stuff (hosting, AI tools, transcription, stock photos) is where writers leak deductions. Auto-pull from one card and tag monthly.
Set aside 25–30% per payment. Pay quarterly. Open a SEP-IRA — you can deduct up to ~20% of net earnings and shrink your tax bill meaningfully.
SnapBooks tracks every invoice, payout, and subscription — so you can keep writing.
Start freeNot legally required — you can operate as a sole prop. An LLC mainly adds liability protection and a more professional look on contracts. Tax-wise it makes little difference until ~$60–80k net.
Yes. Every dollar from Substack, Medium Partner, Patreon, Ghost, Beehiiv, or direct subscribers is self-employment income. Most platforms send a 1099-K or 1099-NEC if you cross $600.
Yes — research books, journal subscriptions, AP Stylebook, Grammarly, Notion, ChatGPT Plus, Scrivener. If you use it for work, it's deductible.
If a portion of your home is used regularly and exclusively for writing, yes. Simplified method = $5/sq ft up to 300 sq ft ($1,500 max). Actual method usually deducts more if rent is high.
If you'll owe more than $1,000 in tax for the year, yes. Pay April 15, June 15, Sept 15, Jan 15. Underpayment = penalty.