Quick answer: The One Big Beautiful Bill Act (signed July 4, 2025) is the most founder-friendly US tax law in years. It lets you deduct AI software and R&D costs immediately, write off 100% of computers and equipment in year one, keep a permanent 20% deduction on pass-through business income, and — if you form a C corporation — potentially pay $0 federal tax on up to $15 million of gain when you sell. To start an AI business today: pick one problem, choose your entity, register and get an EIN, sign up for OpenAI, Anthropic, and Google, build one offer, and land three paying clients in 90 days.
Not tax advice. This guide explains public law in plain English. Your situation is unique — confirm every decision with a licensed CPA or tax attorney before you file.
Key takeaways
- R&D is deductible again — immediately. New Section 174A restores full expensing of domestic research and software development costs starting in 2025 (IRS). [VERIFY: IRS source]
- Hardware is a year-one write-off. 100% bonus depreciation is permanent for property acquired after January 19, 2025, and Section 179 expensing rose to $2.5 million. [VERIFY: IRS source]
- The 20% QBI deduction is permanent. LLC, S corp, and sole-prop AI agencies keep Section 199A. [VERIFY: IRS source]
- QSBS got bigger and faster. $15 million gain cap, $75 million asset limit, and partial exclusions after just 3 years (WilmerHale). [VERIFY: IRS source]
- You can start for under $500 and be selling in 30 days with no code.
What is the One Big Beautiful Bill Act?
The One Big Beautiful Bill Act (OBBBA), H.R. 1 of the 119th Congress, became Public Law 119-21 on July 4, 2025. It made many 2017 Tax Cuts and Jobs Act provisions permanent and added new incentives for investment and innovation. The nonpartisan Tax Foundation highlights permanent 100% bonus depreciation and R&D expensing as its most pro-growth business changes — and those two are exactly what AI founders spend money on.
The 5 tax changes that favor new AI businesses
| Provision | Before OBBBA | After OBBBA | Why AI founders care |
|---|---|---|---|
| R&D expensing (Sec. 174A) | Amortize over 5 years (since 2022) | Deduct domestic R&D in full the year it's spent | Developer salaries, model fine-tuning, and prototype costs cut taxes now [VERIFY: IRS source] |
| Bonus depreciation (Sec. 168(k)) | Phasing down to 40% in 2025 | 100%, permanent | GPUs, workstations, servers written off in year one |
| Section 179 expensing | ~$1.25M limit | $2.5M limit, $4M phase-out | Off-the-shelf software and equipment expensed immediately [VERIFY: IRS source] |
| QBI deduction (Sec. 199A) | Expiring after 2025 | 20%, permanent | Pass-through AI agencies deduct up to 20% of qualified profit [VERIFY: IRS source] |
| QSBS exclusion (Sec. 1202) | $10M cap, 5-year hold, $50M assets | $15M cap, 50%/75%/100% at 3/4/5 years, $75M assets | Potentially tax-free exit for C-corp AI startups [VERIFY: IRS source] |
1. Immediate R&D expensing (Section 174A) [VERIFY: IRS source]
From 2022 to 2024, businesses had to spread domestic research and software development costs over five years — a painful cash hit for startups. OBBBA's new Section 174A lets you deduct those costs fully in tax years beginning after December 31, 2024. Small businesses with average gross receipts of $31 million or less can even elect to apply it retroactively to 2022–2024 and amend prior returns. The IRS explains the transition in its OBBBA provisions hub. Pair this with the federal research credit — qualified startups can apply up to $500,000 of it against payroll taxes.
2. 100% bonus depreciation, permanently [VERIFY: IRS source]
Buy a $6,000 workstation or a GPU server for your AI business and deduct the full cost this year instead of over five to seven years. The permanence matters: you can plan purchases around growth, not expiring deadlines.
3. Bigger Section 179 expensing [VERIFY: IRS source]
Section 179 now lets small businesses expense up to $2.5 million of qualifying equipment and off-the-shelf software per year. Most solo AI founders won't hit the cap — it just means essentially every tool purchase can be deducted. [VERIFY: IRS source]
4. The permanent 20% QBI deduction [VERIFY: IRS source]
If you run your AI business as a sole proprietorship, LLC, or S corporation, Section 199A may let you deduct up to 20% of qualified business income. Income limits apply to consulting-type businesses, so ask your CPA how your services are classified. [VERIFY: IRS source]
5. Expanded QSBS for C-corp founders [VERIFY: IRS source]
For stock issued after July 4, 2025, Section 1202 now excludes 50% of gain after three years, 75% after four, and 100% after five — up to $15 million per company (or 10x your basis). Companies with up to $75 million in gross assets qualify. If you're building an AI product you hope to sell or raise money for, this is the single biggest reason to consider a Delaware or home-state C corporation early. See the full text of 26 U.S.C. § 1202.
Is now actually a good time to start an AI business?
Yes — the tax picture and the demand picture line up. Small business owners are adopting AI fast but lack help implementing it; our 2027 adoption curve analysis shows 76% use AI but only 14% have built it into operations. That gap is your market. The SBA's market research guide is a good free tool to validate a niche before you spend.
How to start an AI business: a 9-step guide
Step 1: Pick one painful problem and one customer type
Don't start with "AI." Start with a costly, repeated problem: missed calls at HVAC shops, no-show appointments at med spas, unanswered reviews at restaurants. Narrow beats broad. Browse our AI Growth Tools catalog for proven problems local businesses pay to solve.
Step 2: Choose your business structure with the new tax rules in mind
| Structure | Best for | Key tax benefit | Trade-off |
|---|---|---|---|
| LLC (single-member) | AI agencies, consultants, freelancers | 20% QBI deduction, simple filing | Self-employment tax on all profit [VERIFY: IRS source] |
| LLC taxed as S corp | Profitable service businesses ($60k+ profit) | QBI + payroll tax savings on distributions | Must run payroll, pay reasonable salary [VERIFY: IRS source] |
| C corporation | AI SaaS/products seeking investors or an exit | QSBS: up to $15M tax-free gain; 21% flat rate | Double taxation on dividends, more admin [VERIFY: IRS source] |
Read the IRS overview of business structures and the SBA's choose a business structure guide.
Step 3: Register the business and get an EIN
- File with your state's secretary of state (SBA: register your business).
- Get a free Employer Identification Number in minutes from the IRS EIN page.
- Open a dedicated business bank account — it makes every deduction above easy to prove.
- Check state and local licenses via the SBA licenses guide.
Step 4: Sign up for the major LLM providers
Want this kind of workflow built for your business?
See Services & Pricing →You'll want at least two providers so you can compare quality and avoid outages. Consumer apps are for your own work; API/developer consoles are for building client products. Not sure which fits? Read our ChatGPT vs Claude vs Gemini vs Perplexity guide.
| Provider | Developer / API sign-up | Consumer app | Best for |
|---|---|---|---|
| OpenAI (ChatGPT + API) | Sign up | Open app | General writing, agents, voice, broad ecosystem |
| Anthropic (Claude) | Sign up | Open app | Long documents, careful reasoning, coding |
| Google (Gemini + AI Studio) | Sign up | Open app | Free tier, huge context, Google Workspace |
| Microsoft Azure AI Foundry | Sign up | Open app | Enterprise and compliance-heavy clients |
| Amazon Bedrock | Sign up | Open app | Many models under one AWS bill |
| Mistral AI | Sign up | Open app | Low cost, open-weight, EU data options |
| Meta Llama | Sign up | Open app | Open models you can self-host |
| xAI (Grok) | Sign up | Open app | Real-time X data and search |
| Perplexity (Sonar API) | Sign up | Open app | Cited, web-grounded answers |
Tip: API usage fees and subscriptions are ordinary business expenses. Pay with your business card so they're tracked automatically.
Step 5: Build a minimum viable offer
Package one outcome at one price: "We'll answer every after-hours call with AI and book jobs into your calendar — $497/month." No-code tools like Zapier, Make, n8n, or Lovable let you ship without hiring developers. Proven starting offers:
- AI receptionist and missed-call text-back (see our speed-to-lead guide)
- Dormant-lead reactivation campaigns (database reactivation guide)
- AI search visibility (AEO and GEO) for local businesses
- AI-assisted content, reviews, and follow-up SMS (SMS follow-up guide)
Step 6: Set up bookkeeping to capture every deduction
Tag R&D time and costs separately from sales and support from day one — that's what makes Section 174A and the research credit defensible. The IRS lets you deduct up to $5,000 of startup costs and $5,000 of organizational costs in your first year (IRS Publication 535, Publication 583). Keep receipts for hardware to claim bonus depreciation.
Step 7: Land your first three paying clients
Start with people who already trust you: past employers, local business owners, your chamber of commerce. Offer a 30-day pilot with a clear metric (calls answered, leads revived). Free mentoring is available through SCORE and your local Small Business Development Center.
Step 8: Get found in Google and AI search
Your buyers are asking ChatGPT and Gemini who to hire. Claim your Google Business Profile, publish clear service pages with FAQs, and add schema markup. Run a free scan with one of these AI visibility tools to see how chatbots describe you.
Step 9: Productize, document, and scale
Once three clients get results, turn the service into a repeatable playbook, then software. That's also the moment to revisit your entity: if a product and outside investment are on the horizon, converting to a C corporation early starts the QSBS holding-period clock. [VERIFY: IRS source]
Your first 90 days
| Timeline | Focus | Done when |
|---|---|---|
| Days 1–7 | Pick niche, meet a CPA, choose entity | Entity filed, EIN issued, bank account open |
| Days 8–30 | LLM accounts, build offer, bookkeeping | Working demo + one-page offer |
| Days 31–60 | Pilots with warm contacts | 3 pilots live with tracked metrics |
| Days 61–90 | Convert pilots, publish case studies, SEO/AEO | 3 paying clients, Google Business Profile live |
Common mistakes to avoid
- Mixing personal and business spending — it weakens every deduction.
- Forming an LLC when you plan to raise VC — you'll miss QSBS time you can't get back. [VERIFY: IRS source]
- Calling everything R&D — sales, support, and routine maintenance don't qualify.
- Building for "everyone" — niche AI services close faster.
- Relying on one LLM — models change pricing and quality often.
Frequently asked questions
What tax law encourages starting an AI business in the US?
The One Big Beautiful Bill Act (Public Law 119-21), signed July 4, 2025. It permanently restores immediate expensing of domestic research and development under Section 174A, makes 100% bonus depreciation permanent, raises the Section 179 expensing limit to $2.5 million, makes the 20% qualified business income deduction under Section 199A permanent, and expands the qualified small business stock (QSBS) exclusion under Section 1202.
Can I deduct AI software development costs immediately?
Yes, for domestic research and experimental costs paid or incurred in tax years beginning after December 31, 2024. New Section 174A lets businesses deduct those costs in the year they are spent instead of amortizing them over five years. Eligible small businesses with average gross receipts of $31 million or less may also elect to apply the change retroactively to 2022 through 2024. Confirm eligibility with a CPA.
What changed with QSBS for startup founders?
For stock issued after July 4, 2025, founders can exclude 50% of gain after three years, 75% after four years, and 100% after five years. The per-company gain cap rose from $10 million to $15 million, and a company can now have up to $75 million in gross assets (up from $50 million) and still qualify. QSBS only applies to C corporations.
Should my AI business be an LLC or a C corporation?
It depends on your goals. An LLC or S corporation is usually simpler for a service-based AI agency and may qualify for the 20% QBI deduction. A C corporation is usually better if you plan to raise venture capital or sell the company, because only C corporation stock can qualify for the QSBS exclusion. Talk to a CPA or tax attorney before choosing.
How much does it cost to start an AI business?
A service-based AI business can start for under $500: a state LLC filing fee (typically $50 to $500), a domain, and $20 to $200 a month in AI subscriptions such as ChatGPT, Claude, or Gemini. The IRS also lets new businesses deduct up to $5,000 of startup costs and $5,000 of organizational costs in the first year.
What AI business can I start with no coding experience?
Popular no-code AI businesses include AI receptionist and chatbot setup for local businesses, AI content and SEO services, AI visibility (AEO/GEO) consulting, lead reactivation campaigns, and workflow automation using tools like Zapier, Make, or n8n connected to LLM APIs.
Which LLM providers should I sign up for first?
Most new AI businesses start with OpenAI (ChatGPT and the OpenAI API), Anthropic (Claude), and Google (Gemini and Google AI Studio). Add Microsoft Azure AI Foundry, Amazon Bedrock, Mistral, Meta Llama, or xAI Grok when clients need specific models, enterprise compliance, or open-weight options.
Are there free resources to help me start an AI business?
Yes. The U.S. Small Business Administration offers free counseling through SCORE mentors and Small Business Development Centers, and the IRS publishes free guides on business structures, startup costs, and the One Big Beautiful Bill Act changes.
Sources and authority resources
- Congress.gov — H.R. 1, One Big Beautiful Bill Act
- IRS — One Big Beautiful Bill provisions
- Tax Foundation — The One Big Beautiful Bill, Explained
- WilmerHale — OBBBA QSBS and R&D highlights [VERIFY: IRS source]
- Cornell LII — 26 U.S.C. § 1202 [VERIFY: IRS source]
- IRS — Research credit
- U.S. Small Business Administration — Business Guide
- IRS Publication 583 — Starting a Business and Keeping Records
Planning beyond launch? Read how to stay ahead of the AI adoption curve in 2027.