The Complete New Consulting Firm Startup Checklist

Starting a consulting firm is exciting, but the business side can trip you up if you skip the basics. This checklist walks you through the essential steps to launch legally and financially sound, with a focus on tax obligations. Follow it in order, and you will avoid common pitfalls that cost new consultants time and money.

1. Choose your legal structure

Your business structure affects taxes, liability, and paperwork. For most solo consultants, an LLC or S-corp is the best fit. Here is how they compare:

• Sole proprietorship: Easiest to set up, but you are personally liable and pay self-employment tax on all profits. No registration fees, but higher tax risk.
• LLC: Limits personal liability. You can be taxed as a sole proprietor (default) or as an S-corp. Formation costs $50-$500 depending on your state.
• S-corp: Requires filing Form 2553 with the IRS. You must pay yourself a reasonable salary and payroll taxes, but you can save on self-employment tax on distributions. Annual costs include payroll processing ($40-$100/month) and additional filing fees.

Action step: Register your LLC with your state’s Secretary of State website. Most states allow online filing and take 1-2 weeks. If you are unsure, consult a CPA or use a service like LegalZoom ($79-$349 plus state fees).

2. Get an EIN and open a business bank account

An Employer Identification Number (EIN) is free from the IRS and required if you have employees or form an S-corp. Even for a sole proprietorship, an EIN keeps your personal and business finances separate, which is critical for tax deductions and liability protection.

Open a business checking account. Many banks offer free business accounts if you maintain a minimum balance (often $1,000-$2,000). Compare options: Chase Business Complete Banking ($15/month, waived with $2,000 balance), Novo (no monthly fee, $0 minimum), or a local credit union.

Action step: Apply for an EIN at IRS.gov (takes 10 minutes). Then open a business account within a week.

3. Set up your accounting system

You need to track income and expenses from day one. Choose accounting software that fits your scale:

• QuickBooks Online: $30-$100/month. Industry standard, integrates with payroll and tax software.
• FreshBooks: $19-$55/month. Simpler interface, good for service businesses.
• Wave: Free for basic accounting, but paid add-ons for payroll and payments.

Set up a separate business credit card to simplify expense tracking. Look for cards with 1.5%-2% cash back, like the Chase Ink Business Unlimited ($0 annual fee) or American Express Blue Business Plus ($0 annual fee).

Action step: Sign up for accounting software and connect your business bank account. Categorize your startup expenses (registration fees, software, office supplies) as you incur them.

4. Understand your tax obligations

As a consultant, you are responsible for paying taxes throughout the year, not just at filing time. Key obligations:

• Self-employment tax: 15.3% on net earnings (Social Security and Medicare). This is in addition to income tax.
• Estimated quarterly taxes: Due April 15, June 15, September 15, and January 15. Use IRS Form 1040-ES. Penalties apply if you underpay by more than $1,000.
• Income tax: Federal rates range from 10% to 37% depending on your bracket. State rates vary; some states like Texas and Florida have no income tax.

Action step: Estimate your annual net income and calculate your quarterly payments. Use the IRS Tax Withholding Estimator or consult a CPA. Set aside 25%-30% of every invoice in a separate savings account for taxes.

5. Get business insurance

Professional liability insurance (errors and omissions) is essential for consultants. It covers claims of negligence or inadequate work. General liability insurance covers property damage or bodily injury. Costs:

• Professional liability: $500-$1,500 per year for solo consultants, depending on your niche and coverage limits ($1M/$2M is standard).
• General liability: $300-$600 per year.

Some clients require proof of insurance before signing contracts. Compare quotes from providers like Hiscox, The Hartford, or Next Insurance. You can often bundle policies for a discount.

Action step: Get at least a professional liability policy before you sign your first client. Shop around and read the policy exclusions carefully.

6. Create a client contract and invoice template

A solid contract protects you and sets clear expectations. Include scope of work, payment terms (e.g., 50% upfront, net 30), late fees, and intellectual property rights. Use a template from a legal service like Rocket Lawyer ($40/month) or adapt a free sample from SCORE.org.

Your invoice should include: your business name, EIN, client name, date, description of services, amount due, and payment instructions. Use accounting software to generate and track invoices automatically.

Action step: Download a contract template and customize it for your services. Set up an invoice template in your accounting software.

7. Plan for retirement and health insurance

Consultants must fund their own retirement and health coverage. Options:

• SEP IRA: Allows contributions up to 25% of net earnings, max $69,000 in 2026. Easy to set up with any brokerage (Fidelity, Vanguard).
• Solo 401(k): Higher contribution limits (up to $69,000 plus catch-up), but more paperwork. Best if you have no employees.
• Health insurance: Buy through the ACA marketplace (HealthCare.gov) or a private broker. Premiums for a single consultant range from $300-$800/month depending on age and state. You can deduct premiums as a business expense.

Action step: Open a SEP IRA at a low-cost brokerage and set up automatic monthly contributions. Compare health plans during open enrollment or after a qualifying event.

8. Track deductible expenses from day one

Common deductible expenses for consultants include:

• Home office (if you have a dedicated space used regularly and exclusively for business)
• Internet and phone (business portion only)
• Software subscriptions (e.g., Adobe, Zoom, project management tools)
• Travel and meals for client meetings (50% of meals)
• Professional development (courses, conferences)
• Marketing and website costs

Keep receipts and log mileage using apps like MileIQ ($5.99/month) or QuickBooks Self-Employed. The IRS standard mileage rate for 2026 is $0.70 per mile.

Action step: Create a spreadsheet or use your accounting software to log expenses weekly. Set up a folder for digital receipts.

FAQ

Q: Do I need to register my consulting business with my state? A: Yes, if you form an LLC or corporation. Sole proprietors may need a business license or permit depending on their city or county. Check your local government website.

Q: How much should I set aside for taxes as a new consultant? A: Plan to set aside 25%-30% of your net income for federal and state taxes. If you are in a high tax bracket or high-tax state, increase that to 35%.

Q: Can I deduct startup costs before I have revenue? A: Yes. The IRS allows you to deduct up to $5,000 in startup costs in your first year, with the rest amortized over 180 months. Keep records of all pre-launch expenses.

Q: When do I need to pay estimated taxes? A: Quarterly on April 15, June 15, September 15, and January 15. If you miss a payment, you may owe penalties. Use Form 1040-ES to calculate.

Related guides

• The Annual New Consulting Firm Review Checklist
• 7 Questions to Ask Before Buying a New Consulting Firm
• 7 Things to Know Before You Start a New Consulting Firm

The bottom line

Launching a consulting firm requires more than expertise in your field. By following this checklist, you will set up a legally sound, tax-efficient business from day one. Complete each step in order, and you will avoid costly mistakes. If you are unsure about any tax decision, invest in a CPA for a one-time consultation ($200-$500). It pays for itself in peace of mind and savings.