What Can New Hampshire Businesses Deduct?

How the Business Profits Tax and Business Enterprise Tax Work

The Business Profits Tax (BPT) applies to taxable business profits for any entity with gross business income above $75,000. The current BPT tax rate has been gradually declining under recent legislation, making the state more competitive for small business owners. The Business Enterprise Tax (BET) is a separate levy based on the enterprise value tax base, which includes total compensation and interest and dividends paid by the business enterprise.

Here is why that matters: your BPT tax return starts with federal taxable income, then applies New Hampshire-specific adjustments. Every legitimate federal tax deduction flows through to your state tax return. The New Hampshire Department of Revenue Administration publishes a guide each year that outlines these adjustments. Organizations operating a unitary business must use combined reporting, which adds another layer of complexity to filing.

One detail most guides skip: the BET paid can be credited against your BPT obligation, dollar for dollar up to the BPT amount owed. That credit means you rarely pay the full combined amount. A small business accounting firm familiar with this credit structure can help you time payments to maximize cash flow.

Ordinary and Necessary Business Expenses

The Internal Revenue Service defines a qualifying expense as both ordinary (common in your trade) and necessary (helpful for running operations). That same standard applies when calculating state taxable income for your BPT tax return.

Typical costs that qualify include:

• Rent for office, warehouse, or retail space
• Utilities such as electricity, internet, and phone service
• Office supplies, software subscriptions, and equipment
• Insurance premiums for liability, property, and workers’ compensation coverage
• Professional fees paid to attorneys, accountants, or a Certified Public Accountant

Each expense must connect directly to your operations. A receipt alone is not enough. The IRS looks for a clear link between the cost and a legitimate business purpose.

Employee Wages, Payroll, and Benefits

Compensation is usually the largest single write-off for employers. Salaries, wages, commissions, and bonuses all qualify. So do employer contributions to retirement plans like 401(k)s, SEP IRAs, and SIMPLE IRAs. Health insurance premiums paid on behalf of employees count as well.

Payroll obligations (the employer share of Social Security and Medicare under the Federal Insurance Contributions Act) count as a separate claim from the wages themselves. Independent contractor payments qualify too, provided you file the correct IRS tax forms. Poor documentation of contractor relationships is one of the most common audit triggers for payroll and bookkeeping compliance.

Home Office Tax Deduction

Self-employed individuals and sole proprietorship owners who use part of their home exclusively for work can claim a home office deduction. Two methods exist. The simplified option allows $5 per square foot up to 300 square feet. The regular method requires calculating actual costs for mortgage interest or rent, utilities, insurance, and repairs proportional to the space used.

Both methods reduce taxable income on your federal tax return, which flows directly into your BPT calculation. Keep floor plans and utility bills on file. The Department of Revenue Administration can request supporting documents during an audit just as the IRS would.

Vehicle and Travel Expenses

Owners who drive for work can choose between the standard mileage rate and the actual expense method covering gas, repairs, insurance, and depreciation. Whichever method you pick in the first year generally locks you in for that vehicle.

Travel expenses for trips with a direct connection to your trade also qualify. Airfare, lodging, and ground transportation are eligible when the trip serves a clear purpose. Meal costs are partially claimable at 50 percent. Keep mileage logs and receipts organized by date.

Depreciation and Section 179 Write-Offs

Capital assets like equipment, computers, furniture, and vehicles lose value over time. Depreciation lets you spread that cost across several years. Section 179 allows you to deduct the full purchase price of qualifying assets in the year they go into service, up to the annual limit.

Bonus depreciation may also apply to certain new and used property. These federal rules carry through to your state tax returns. One mistake I see repeatedly: owners forget that New Hampshire follows federal depreciation schedules. If you elect Section 179 on your federal return, that same amount reduces your BPT taxable income automatically.

Advertising, Marketing, and Growth Costs

Spending on advertising and marketing qualifies when tied to promoting your products or services. Online ad campaigns, print materials, website hosting, design work, and event sponsorships all count. Even the cost of a grand opening or community event falls under this category if the primary purpose is generating revenue.

Education and Professional Development

Training that maintains or improves skills used in your current trade is eligible. Conferences, trade publications, seminars, and online courses all qualify. The key restriction: the education must relate to your existing work. Courses that prepare you for a completely new career do not count.

Interest on Loans and Credit

Interest paid on loans used for operations qualifies. This covers real estate loans, equipment financing, lines of credit, and even credit card interest when charges are exclusively for work purposes. A limited liability company or partnership that borrows to fund expansion can claim interest payments on that debt without limitation in most cases.

State and Local Tax Deductions for New Hampshire Entities

Payments toward the BPT and BET are claimable on your federal tax return as state tax obligations. That write-off then cycles back to lower your net income, which affects the following year’s state calculation. No general sales tax or income tax on wages exists here, so the discussion centers entirely on income-based levies and property assessments.

Property tax exemptions may apply to certain categories of assets depending on the municipality. Check with your local assessor. These exemptions do not appear on your BPT return, but they reduce cash outflow and free up capital for reinvestment.

Bad Debts and Net Operating Losses

Unpaid invoices or loans you cannot collect may qualify as bad debt write-offs. You need documentation showing a genuine attempt to collect before writing off the amount. A net operating loss from a year when claims exceed gross income can be carried forward to offset future profits, reducing your tax liability in later periods.

Charitable Contributions

Corporations can deduct cash, property, or equipment donated to qualifying organizations. S corporations and partnerships pass the benefit through to individual owners on their personal returns. The NH Community Development Finance Authority (CDFA) also offers a credit program that provides an additional incentive beyond the standard charitable write-off.

Recordkeeping and Preparation Checklist

Accurate records turn potential savings into actual ones. The IRS and the New Hampshire Department of Revenue both expect receipts, bank statements, invoices, and contracts available upon request. A solid preparation checklist covers:

• Separate accounts for all transactions
• Monthly reconciliation of income and expenses
• Mileage and travel logs maintained in real time
• Copies of all filed returns and supporting schedules

Accounting software or an outsourced end-of-year accounting review can catch missed items before you file. Both the software cost and the accounting fees themselves are claimable.

Common Mistakes That Trigger Audits

Mixing personal and work expenses is the fastest way to draw scrutiny. Other frequent errors include overstating vehicle use, failing to document the purpose of meals, and claiming a home office that doubles as a guest bedroom.

Avoid these problems by:

• Maintaining a dedicated bank account
• Logging expenses at the point of purchase
• Reviewing your financial plan with a tax professional before year-end
• Using a guide for filing that matches your entity type (LLC, S corporation, partnership, or sole proprietorship)

Hiring a Tax Professional in New Hampshire

A qualified CPA or tax professional does more than prepare returns. They help you build tax strategies around estimated payments, retirement contributions, and entity structure decisions. Hiring a tax professional is itself a qualifying expense, and the ROI usually far exceeds the fee.

In my experience working with owners across southern New Hampshire, the biggest missed opportunity is not taking the BET credit against BPT. The second most common gap is failing to make estimated tax payments on time, which triggers penalties that erode whatever tax savings the claims provided.