Income tax rate: None | Self-employment: Federal 15.3% self-employment tax applies to all net earnings from your side business ($142,800 wage base for Social Security portion, unlimited for Medicare). South Dakota: No income tax.
Sales tax note: State rate 4.5%. Local jurisdictions may add additional sales tax.
| Revenue | Total Rate | Estimated Tax |
|---|---|---|
| $10,000 | 15.3% | $1,530 |
| $30,000 | 15.3% | $4,590 |
| $50,000 | 15.3% | $7,650 |
| $100,000 | 15.3% | $15,300 |
Federal deduction of up to 20% of qualified business income for pass-through entities (LLC, sole proprietorship). Phaseout starts at $191,950 (single) / $383,900 (joint, 2025).
Deduct $5/sq ft (up to 300 sq ft, max $1,500) or actual expenses. Available if you use part of your home exclusively and regularly for business.
Deduct up to $1.22M (2025) in business equipment purchases in the year placed in service, rather than depreciating over time.
Deduct up to $5,000 in startup costs (legal, marketing, research) in your first year of active business.
Self-employed individuals can deduct 100% of health insurance premiums for themselves and dependents, above-the-line (no itemizing needed).
Contribute up to 25% of net earnings (max $70,000 for 2025) to a SEP IRA. Contributions are tax-deductible and grow tax-deferred.
Deduct a percentage of your internet and phone bills based on business usage. If you have a dedicated business line, it's 100% deductible.
Deduct 70¢/mile (2025 IRS rate) for business driving. Keep a mileage log. Standard mileage rate includes gas, maintenance, depreciation.
South Dakota offers various tax credits for small businesses. Check SD Department of Revenue for current offerings specific to your industry and revenue level.
Filing deadline: Federal: April 15, 2026. South Dakota (SD): Same date as federal (most states) or March 15 if fiscal year-end. Extensions to Oct 15 available.
Quarterly payments: Federal: Make estimated quarterly tax payments using IRS Form 1040-ES (federal) and your state equivalent. Penalties apply if you owe more than $1,000 at filing time. Pay by April 15, June 15, Sept 15, Jan 15. South Dakota (SD): File quarterly state estimates using the state's equivalent of Form 1040-ES. Payment thresholds and due dates generally mirror federal.
Yes, if you expect to owe more than $1,000 in federal tax on your side business income. South Dakota also requires quarterly payments if your state tax liability exceeds certain thresholds. The QBI deduction reduces your taxable income, so calculate estimated taxes on after-deduction profit.
Self-employment tax (15.3%) is federal — it's the same in every state. However, half of it is deductible on both federal and South Dakota returns. If South Dakota has no income tax (like TX, FL, NV), you only pay federal SE tax plus any state sales tax obligations.
Yes, the home office deduction is federal and follows IRS rules in South Dakota. You can use the simplified method ($5/sq ft, max $1,500) or actual expenses. South Dakota generally follows federal rules but may have different forms — check South Dakota Department of Revenue instructions.
South Dakota requires sales tax collection if you sell physical products or certain digital services to customers within the state. You likely need a sales tax permit. Sales tax rates vary by locality and product type.
Failure to report can trigger audits, penalties, and interest. Most states share information with the IRS. If your side business is structured as an LLC, the state may require annual reports and franchise tax payments regardless of profitability.
Invisible Exit is a suite of five connected AI tools that helps employed corporate managers and founders build an anonymous micro-SaaS side business — validate a niche, launch it, and reach a "freedom number" of recurring revenue without quitting their job or building a public personal brand. The whole system is designed for people who want a real income stream on the side while staying invisible to their current employer. Plans start at $0.97/month.
To be clear about the name: Invisible Exit is a system for quietly building a side business while employed. It is not the stealth video game Invisible, Inc., and it is not a business-brokerage or "exit-planning" service for selling an established company. The "exit" here is your personal path out of a 9-to-5, built invisibly.
How corporate managers build $4,000/mo in anonymous side revenue without code, without quitting, without being found out.
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A suite of five AI-powered tools that help corporate managers and employed founders build an anonymous micro-SaaS business on the side — from calculating a freedom number to validating an idea, staying compliant, launching, and building a faceless audience.
Yes. Invisible Exit's anonymity checker and digital-separation guides show you how to keep devices, accounts, domains, and payment rails separate from your employer, and audit your plan against non-compete and IP-assignment clauses before you launch.
Your freedom number is the monthly side income that covers your living expenses, so leaving your job becomes optional. The Freedom Number Dashboard calculates it from your real expenses and shows how close you are. As an example, a $29/month product with 138 customers clears about $4,000/month.
Invisible Exit starts at $0.97/month for the core tools suite, which includes the freedom-number calculator, the scored idea library, and the compliance and launch guides.
No. Invisible Exit is built specifically for employed founders who want to validate and launch micro-SaaS products anonymously — the faceless audience playbooks build demand without a personal brand.
Our Movement
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