How to File Taxes for Income From Substack

Paid newsletters have become a significant source of income for writers, journalists, and independent creators. What may have started as a passion project can quickly turn into recurring subscription revenue, sponsorships, and premium content tiers.

If you earn money through Substack, the IRS generally treats that as self-employment income. That means you have tax obligations beyond simply reporting a side hustle on your return.

In this guide, you will learn how to file taxes for income from Substack, which forms apply, what deductions you can claim, and how to avoid common mistakes that cost creators money. Whether you are publishing part-time or building a media empire, understanding Substack taxes is essential to protecting your profits.

Key Highlights

• Substack income is typically treated as self-employment income and must be reported.

• You may receive a Substack IRS Form 1099-K, Payment Card and Third Party Network Transactions, from Stripe, but you must report income even if you do not receive a form.

• Most writers report Substack income on Schedule C (Form 1040), Profit or Loss from Business (Sole Proprietorship), and pay self-employment tax using Schedule SE (Form 1040), Self-Employment Tax.

• Common deductions include home office expenses, software fees, equipment, and marketing costs.

• Many newsletter creators must make quarterly estimated tax payments.

• Professional tax planning can help you reduce risk and avoid overpaying.

Is Substack Income Taxable?

In short, yes. If you are earning paid subscription revenue through Substack, that income is taxable.

Why Substack Income Is Considered Self-Employment Income

Payments from readers who subscribe are considered business income. Even if writing is not your full-time job, the IRS typically views cases of recurring paid newsletter income as operating a business.

Most Substack writers:

• Operate as sole proprietors and file using Schedule C

• Form a single-member LLC

• Receive payments through Stripe

• Control pricing, enter content, and growth strategy

Because you are generating income from your own platform and retaining profits after expenses, you are generally considered self-employed.

Self-employed individuals must pay both income tax and self-employment tax on net earnings.

What If It’s Just a Hobby?

Some writers assume their newsletter is a hobby, especially if they have a traditional W-2 job with an employer. The IRS distinguishes between a hobby and a business based on profit motive.

Key factors to determine whether you're a hobbyist or running a business include:

• Are you trying to make a profit?

• Do you market or promote your newsletter?

• Do you track expenses and income?

• Has it generated profit in multiple years?

If you classify Substack income as a hobby and the IRS determines it is a business, you could face penalties and back taxes. For most paid newsletter creators, especially those charging subscriptions, it is safer and more accurate to treat the activity as a small business. If you're having difficulty making that distinction, a tax professional can guide you.

Tax Forms You May Receive From Substack

Understanding which forms apply is critical when learning how to report Substack income.

Understanding Form 1099-K

Most Substack payments are processed through Stripe. If you meet certain thresholds, Stripe may issue you a Form 1099-K.

Important 1099-K details:

• A 1099-K reports gross payments processed through third-party networks.

• It may include amounts before platform and processing fees.

• Starting in 2025, the threshold is generally $20,000 and 200 transactions.

Because the form reports gross payments, your reported revenue may be higher than what you deposited after fees. You won't receive IRS Form 1099-K if you fail to meet reporting thresholds, but you're still responsible for reporting the income you do receive. This underscores why accurate bookkeeping is essential.

What If You Don’t Receive a Tax Form?

Even if you do not receive a Substack 1099-K or IRS Form 1099-NEC, Nonemployee Compensation, which both feature different reporting thresholds, you are still required to report all income.

The IRS requires you to report income, whether or not a form is issued. If you don't receive a Substack 1099-NEC or 1099-K, you should rely on:

• Stripe statements

• Substack payout summaries

• Bank deposit records

Failing to report income simply because you did not receive a form will likely trigger penalties or audit notices.

How to Report Substack Income on Your Tax Return

If you operate as a sole proprietor or single-member LLC for living, you will typically report income on your individual tax return.

Filing Schedule C

Most Substack writers use Schedule C to report profit or loss from their writing business.

On Schedule C, you will do a few things:

1. Report gross revenue from Substack.

2. Deduct eligible business expenses.

3. Calculate your net profit.

That net profit is the amount subject to income tax and self-employment tax.

For creators who post on Substack and want expert tax filing support, professional guidance can help ensure expenses are properly categorized and that you take every deduction, so none are missed.

Paying Self-Employment Tax With Schedule SE

After calculating net profit, you must also calculate self-employment tax using Schedule SE.

The current self-employment tax rate is 15.3%. This covers:

• Social Security

• Medicare

The good news is that you can deduct half of your self-employment tax when calculating your adjusted gross income.

Where It Appears on Form 1040

Your Schedule C net profit flows to:

• Schedule SE for self-employment tax

• IRS Form 1040, U. S. Individual Income Tax Return, as part of your total taxable income

This combined impact determines what you'll ultimately owe.

Common Tax Deductions for Substack Writers

The IRS allows you to deduct ordinary and necessary business expenses. For Substack newsletter creators, that can add up quickly.

Below is a breakdown of common tax deductions for writers:

Let’s explore a few in more detail.

Home Office Deduction

If you use a space exclusively and regularly for writing and managing your newsletter, you may qualify for the home office deduction.

You can choose between two calculation methods:

• Simplified method

• Actual expense method

The space must be used solely for business to qualify.

Software and Platform Fees

Substack fees and Stripe processing fees are deductible. Other tools, such as email design software, analytics platforms, and project management tools, also qualify if used for your newsletter.

Equipment and Supplies

Laptops, recording equipment, lighting, and office supplies may be deductible. Depending on cost, you may deduct them in full or depreciate them over time.

Marketing and Advertising

Expenses related to marketing your Substack are typically deductible if directly tied to growing your newsletter, including:

• Paid promotions

• Website domains

• Graphic design

• Branding services

Professional Services

Fees paid to business consultants, virtual accountants, or legal professionals are deductible business expenses. If you use full-service bookkeeping to track revenue and expenses, that cost is also deductible.

Do Substack Writers Need to Pay Quarterly Taxes?

Many self-employed creators overlook this step and end up with penalties.

When Estimated Payments Are Required

If you expect to owe $1,000 or more in taxes for the year from Substack income, you generally must make quarterly estimated payments.

Here are standard quarterly deadlines:

Missing payments may result in penalties and interest.

How to Calculate Estimated Payments

You can base your quarterly estimated tax calculations on:

• Projected current-year profit

• Safe harbor rules using prior-year tax liability

Consider working with a year-round tax advisor for personalized advice, proactive planning, and to avoid unpleasant surprises.

State and Local Tax Considerations

Federal tax is only part of the picture. State and local tax considerations are essential.

Income Tax by State

Most states tax business income, while filing thresholds and rates vary. Your obligations may change if you:

• Have moved states

• Hired contractors

• Operate in multiple jurisdictions

Sales Tax and Digital Products

In many states, digital subscriptions are not subject to sales tax. However, certain states have evolving rules for digital products and services.

Because state rules vary significantly, professional guidance is often necessary to ensure compliance.

Recordkeeping Best Practices for Substack Creators

Strong recordkeeping protects you from errors and reduces audit risk.

Separate Business and Personal Finances

While not a law, opening a dedicated business bank account is a best practice. This simplifies tracking and supports the position that your newsletter is a legitimate business.

Track Revenue and Fees Accurately

Remember that your 1099-K may show gross income before fees, not net income. You must:

• Report gross income

• Deduct platform and processing fees separately

Monthly bookkeeping support can help reconcile Stripe reports and bank deposits accurately.

Keep Documentation for Every Deduction

Maintain documentation in support of every Substack-related deduction you claim, such as:

• Receipts

• Invoices

• Subscription tool records

• Mileage logs, if applicable

If the IRS questions your return, documentation is critical and will support a robust audit defense.

Avoiding Common Tax Mistakes as a Substack Writer

Here are the most common errors we see among newsletter creators:

• Forgetting to submit quarterly estimated taxes

• Not setting aside enough money for self-employment tax

• Underreporting 1099-K income

• Overlooking deductible expenses

• Mixing personal and business funds

An IRS audit can be stressful and time-consuming. Having professional audit defense support in place offers added protection.

When to Work With a Professional Accountant

As your newsletter income grows, your tax situation becomes more complex.

Signs You Need Expert Support

• Rapid revenue growth

• Launching an LLC or electing S corporation status

• Hiring contractors

• Earning income across multiple states

Professional support can help ensure compliance while identifying opportunities to reduce your tax burden.

Turning Newsletter Income Into a Scalable Business

Substack income is business income and should be treated as such. With the right strategy and support, you can:

• Optimize entity structure

• Maximize retirement contributions

• Plan for expansion

• Improve cash flow forecasting

If you're ready to efficiently grow your Substack creator business, our team of experts at 1-800Accountant, America's leading virtual accounting firm, can prepare and file your taxes and help you align your tax strategy with long-term goals.

Schedule a free 30-minute consultation to review your Substack income tax strategy and to get started.