Small Business Tax Deductions Finder 2025 - S Corp, LLC & Sole Proprietor
Discover every available small business tax deduction you qualify for in the 2025 tax season. Whether you are looking for specific tax deductions for self employed freelancers, or require a detailed list of S Corp tax deductions, this interactive tool simplifies the process. We help you identify commonly missed tax deductions specific to your entity type to ensure you don’t overpay. Use our free calculator to estimate write-offs for professionals and business owners – covering home office costs, mileage, and other essential small business tax deductions backed by the latest IRS guidelines.
Find Your Small Business Tax Deductions by Entity Type
Select your business structure below to generate a personalized list of small business tax deductions. This step ensures you see the correct tax deductions for self employed individuals, partnerships, or the specific requirements for S Corp tax deductions.
Step 1: Choose Your Business Type
↑ Select Your Business Structure to Get Started
Step 2: Review Tax Deductions for Self Employed Owners & Commonly Missed Tax Deductions
↓ Explore the expenses you qualify for, uncover commonly missed tax deductions that reduce your taxable income, and use our quick estimators to maximize your small business tax deductions. Once you’ve identified potential savings, our Tax Strategy and Preparation Services can help you implement these deductions correctly.
Commonly Missed Tax Deductions by Business Type
These are the tax deductions for self employed individuals and small business owners that are most frequently overlooked:
Schedule C Tax Deductions for Self Employed Sole Proprietors
Sole Proprietorships and Single-Member LLCs report tax deductions for self-employed individuals on Schedule C. Key small business tax deductions include:
View IRS Schedule C Instructions- Invoices and receipts from advertising vendors
- Copies of ads, promotional materials, business cards
- Digital ad platform statements (Google Ads, Facebook Ads)
- Sponsorship agreements and proof of payment
- Commission agreements or contracts
- 1099-NEC forms issued to recipients
- Payment processor statements (PayPal, Stripe, Square)
- Bank statements showing commission payments
Advertising $$$ High Value
Costs associated with promoting your business, including online advertisements, printed flyers, business cards, or sponsorships of events. These expenses must be ordinary and necessary for your trade or business to qualify as deductible.
Commissions and fees $$ Medium Value
Payments made to sales agents, referral partners, or online platforms for services like payment processing or brokerage fees, as long as they are directly related to generating business income.
- Repair invoices
- Work descriptions
- Asset purchase records
- Form 4562
- Lease or rental agreements
- Monthly payment records
- Landlord contact information
- Invoices from advertising vendors
- Copies of promotional materials
- Digital ad platform statements
Repairs and maintenance $ Medium Value
Costs to maintain and repair business assets in their current condition, without adding significant value or extending life.
Depreciation $$ High Value
Deduction for the allocation of asset costs over time based on useful life and depreciation methods.
IRS Publication 946 - DepreciationDepletion $ Lower Value
Deduction for the exhaustion of natural resources owned by the corporation.
Rents $$ High Value
Lease payments for business property, equipment, or vehicles used in operations.
Advertising $$ High Value
Costs for promoting products or services through various media channels.
- Mileage log with dates, destinations, business purpose
- Gas receipts and repair invoices if using actual expenses
- Vehicle title or lease agreement
- Business use percentage calculation
- Travel itinerary with business purpose
- Hotel and transportation receipts
- Mileage for local transportation
- Per diem calculations if used
- Receipts showing cost and place
- Names of attendees and business relationship
- Business purpose discussion notes
- Documentation to separate entertainment costs (not deductible) from meals
Car and truck expenses $$$ High Value
Expenses for using vehicles in your business, either using the standard mileage rate or actual expenses like gas, repairs, and insurance.
Note: Standard mileage rate for 2025: $0.70/mile
Travel expenses $$$ High Value
Costs for business travel away from your tax home, including airfare, lodging, and transportation, but not commuting.
Business meals $$ Medium Value
50% of costs for meals during business travel or with clients, provided the meal is not lavish and has a business purpose.
Note: 50% deductible in 2025
- Contracts or agreements with contractors
- Invoices from contractors
- W-9 forms from all contractors
- 1099-NEC forms issued (if over $600/year)
- Proof of payment (canceled checks, bank transfers)
- Payroll records and timesheets
- W-2 forms issued to employees
- Payroll tax deposits (Form 941)
- Documentation for any employment credits claimed
Contract labor $$$ High Value
Amounts paid to independent contractors or freelancers for work performed, such as graphic design or consulting. If payments exceed $600 per year to an individual, you must issue Form 1099-NEC.
Wages (less employment credits) $$$ High Value
Salaries and wages paid to employees, reduced by any employment tax credits such as the Work Opportunity Tax Credit (WOTC).
- Purchase invoices with dates and amounts
- Asset descriptions and serial numbers
- Date placed in service
- Business use percentage if also used personally
- Form 4562 filed with tax return
- Invoices and receipts from repair services
- Description of work performed
- Date of service
- Proof that expense maintains (not improves) property
- Lease agreements
- Monthly payment receipts or statements
- Business use percentage documentation
- Lease or rental agreement
- Monthly rent payment records
- Landlord's name, address, and TIN (if required)
Depreciation and section 179 expense deduction $$$ High Value
The cost of business assets like equipment or vehicles can be deducted over their useful life through depreciation, or you can elect to expense up to certain limits under Section 179. Bonus depreciation is available at 60% for qualified property placed in service in 2025.
Note: Section 179 limit for 2025: $1,220,000
IRS Publication 946 - DepreciationRepairs and maintenance $$ Medium Value
Expenses for routine repairs and maintenance to keep business property in good working condition, but not for major improvements that add value.
Rent or lease: Vehicles, machinery, and equipment $$ Medium Value
Lease payments for vehicles, machinery, or equipment used in your business, prorated for business use if also used personally.
Rent or lease: Other business property $$$ High Value
Rent paid for office space, retail locations, warehouses, or other real property used in the business.
- Invoices from professionals detailing services
- Proof of payment
- Description of business purpose
- Insurance policy documents
- Premium payment receipts
- Policy declarations showing business coverage
- Receipts from office supply stores
- Software subscription invoices
- Credit card statements showing purchases
- Purchase receipts and invoices
- Inventory records if applicable
- Documentation linking supplies to business use
- Monthly utility bills
- Business use percentage if home-based
- Internet and phone bills highlighting business use
Legal and professional services $$ Medium Value
Fees paid to attorneys, accountants, consultants, or other professionals for services directly related to your business operations or compliance.
Insurance (other than health) $$ Medium Value
Premiums for business-related insurance policies, including liability, property, malpractice, or workers' compensation insurance. Personal insurance does not qualify.
Office expense $ Lower Value
Costs for office supplies such as paper, ink, pens, and software subscriptions; these are items that are consumed quickly and not considered capital assets.
Supplies $$ Medium Value
Costs of materials and supplies directly used in your business operations, such as raw materials for manufacturing or cleaning supplies for a service business.
Utilities $$ Medium Value
Costs for utilities like electricity, water, heating, and internet service used in your business location.
- Form 1098 or lender statements
- Loan documents showing business purpose
- Payment records
- Credit card statements showing business purchases
- Loan agreements and payment schedules
- Interest statements from lenders
- Tax payment receipts and confirmations
- Business license renewals
- Permit applications and fees
- Property tax statements for business property
- Benefit plan documents
- Premium payment receipts
- Employee eligibility records
- Plan documents and adoption agreements
- Contribution records and confirmations
- Employee deferral elections
- Form 5500 if applicable
- Property acquisition costs and basis
- Units extracted or sold during the year
- Calculation worksheets for cost or percentage depletion method
- Certification from qualified professional
- Installation invoices and costs
- Energy savings calculations
- Building square footage documentation
Interest: Mortgage (paid to banks, etc.) $$ Medium Value
Interest payments on mortgages or loans secured by business property, such as an office building or warehouse.
Interest: Other $ Lower Value
Interest on other business debts, like credit cards used for business purchases or unsecured loans for operating expenses.
Taxes and licenses $$ Medium Value
Business-related taxes, including state and local taxes, payroll taxes, and fees for licenses, permits, or certifications required to operate.
Employee benefit programs (other than pension/profit-sharing) $$ Medium Value
Expenses for providing benefits to employees, such as health insurance premiums, group life insurance, or disability insurance, excluding retirement plans.
Pension and profit-sharing plans $$$ High Value
Contributions made to qualified retirement plans for employees, including SIMPLE IRAs, SEP IRAs, or 401(k) plans.
Depletion $ Lower Value
Deduction for the reduction in value of natural resources like oil, gas, or timber extracted from property. You can use either the cost depletion or percentage depletion method, depending on what provides the greater benefit.
Note: Applies to natural resource extraction businesses
Energy efficient commercial buildings deduction $$ Medium Value
A deduction of up to $0.54 to $1.08 per square foot for installing energy-efficient systems in commercial buildings, based on the level of energy savings achieved.
IRS Information on Energy Efficient BuildingsOther Small Business Tax Deductions (Common Expense Examples)
- Documentation of startup or organizational costs
- Dates when business began operations
- Form 4562 filed with return
- Original invoices and account statements
- Documentation of collection efforts
- Written-off amount and date
- All pre-opening expenses with dates
- Market research costs
- Legal and consulting fees for formation
- Date business began operations
- Contractor invoices for modifications
- Before and after photos
- Documentation of ADA compliance improvements
- Purchase invoices clearly showing per-item cost
- Written accounting policy electing de minimis safe harbor
- Applicable financial statement if available
- Production budgets and expense reports
- Contracts with cast and crew
- Evidence of qualified production status
- Property information and acreage
- Planting contracts and costs
- Seedling purchase receipts
Amortization $ Lower Value
The gradual deduction of costs for startup expenses, organizational costs, or intangible assets over a period of time, typically 15 years for startup costs.
Bad debts $ Lower Value
Deductions for accounts receivable or loans that become uncollectible, available only if you use the accrual accounting method.
Business startup costs $$ Medium Value
Up to $5,000 can be deducted immediately for costs to investigate or create a business, with the remainder amortized over 15 years.
Deduction for removing barriers to individuals with disabilities and the elderly $ Lower Value
Up to $15,000 per year for expenses to make your business more accessible, such as installing ramps or modifying restrooms.
De minimis safe harbor for tangible property $$ Medium Value
Allows expensing of individual items costing up to $2,500 per invoice or item, instead of capitalizing them.
Film, television, and live theatrical production expenses $ Lower Value
Special expensing allowances for qualified costs incurred in producing films, TV series, or live theatrical performances.
Forestation and reforestation costs $ Lower Value
Deduction of up to $10,000 per qualified timber property for costs related to planting or seeding trees.
Calculators: Tax Deductions for Self Employed
Get instant estimates for these commonly missed tax deductions and essential small business tax deductions:
Mileage Deduction
Eligibility Requirements:
Home Office (Simplified)
Eligibility Requirements:
Self-Employed Health Insurance
Eligibility Requirements:
Note: Deducted on Form 1040, not Schedule C
SEP-IRA Contribution
Eligibility Requirements:
Maximum contribution: 20% of net SE income (2025 limit: $69,000)
Business Meals (50%)
Eligibility Requirements:
These are estimates only. Actual small business tax deductions depend on your specific situation and eligibility. Consult with a tax professional for personalized advice.
Partnership Tax Deductions (Form 1065) - Multi-Member LLC Deductions
Partnerships and Multi-Member LLCs report expenses on Form 1065. Key small business tax deductions for partnerships include:
View IRS Form 1065 Instructions- Payroll records and timesheets
- W-2 forms issued
- Payroll tax deposits (Form 941)
- Employment agreements
- Partnership agreement specifying guaranteed payments
- Payment records and dates
- Schedule K-1 showing guaranteed payments reported to partners
Salaries and wages (other than to partners) $$$ High Value
Compensation, including salaries, wages, bonuses, and other payments, provided to employees who are not partners. These must be reasonable, ordinary, and necessary for the business, and do not include payments to partners.
Guaranteed payments to partners $$$ High Value
Fixed payments made to partners for services rendered or for the use of capital, which are deductible by the partnership even if the business incurs a loss. These payments are reported as income to the receiving partner.
Note: Deductible even if partnership has a loss
- Repair invoices and receipts
- Description of work performed
- Documentation showing repair (not improvement)
- Lease agreements
- Monthly rent payment records
- Landlord information
- Asset purchase records
- Dates placed in service
- Form 4562
- Depreciation schedules
Repairs and maintenance $$ Medium Value
Expenses for routine repairs and maintenance of business property, equipment, or facilities to keep them in normal operating condition, excluding any costs that substantially improve or extend the life of the asset.
Rent $$$ High Value
Payments for renting or leasing property, equipment, vehicles, or other assets used in the partnership's trade or business, including office space or machinery.
Depreciation $$$ High Value
The systematic deduction of the cost of tangible business assets over their useful lives using methods like MACRS; Form 4562 must be attached to report details.
IRS Publication 946 - Depreciation- Loan agreements
- Interest statements from lenders
- Form 1098 if applicable
- Business purpose documentation
- Original invoices and account statements
- Documentation of collection efforts
- Written-off amount and date
- Tax payment receipts
- Business license documentation
- Property tax statements
- Payroll tax deposits
Interest $$ Medium Value
Interest paid on loans, credit lines, or other debts incurred for business purposes, subject to limitations like the business interest expense deduction rules under Section 163(j).
Note: Subject to Section 163(j) limitations
Bad debts $ Lower Value
Deductions for business debts or accounts receivable that become partially or wholly worthless during the tax year, but only if the partnership uses the accrual method of accounting.
Taxes and licenses $$ Medium Value
Various taxes paid by the partnership, such as state and local income taxes, real estate taxes, payroll taxes, and fees for business licenses, permits, or regulatory compliance.
- Plan documents
- Contribution confirmations
- Employee eligibility records
- Form 5500 if required
- Benefit plan documents
- Premium payments
- Employee participation records
Retirement plans, etc. $$$ High Value
Contributions to qualified retirement plans for employees, including pensions, profit-sharing plans, 401(k)s, or SIMPLE IRAs, within IRS limits.
Employee benefit programs $$ Medium Value
Costs for providing non-retirement benefits to employees, such as health insurance, group term life insurance, disability plans, or educational assistance.
- Property acquisition costs
- Units extracted during year
- Depletion calculation worksheets
- Certification from qualified professional
- Installation costs
- Energy savings documentation
Depletion (Do not deduct oil and gas depletion) $ Lower Value
Deduction for the depletion of natural resources such as minerals or timber; however, oil and gas depletion is not deducted at the partnership level and is instead passed through to the partners.
Note: Oil & gas depletion passes through to partners
Energy efficient commercial buildings deduction $$ Medium Value
Deduction for costs associated with installing energy-efficient heating, cooling, lighting, or other systems in commercial buildings, calculated per square foot based on energy savings achieved.
IRS Information on Energy Efficient BuildingsOther Common Partnership Small Business Tax Deductions
Amortization
$ Lower ValueInsurance premiums
$$ Medium ValueLegal and professional fees
$$ Medium ValueSupplies used and consumed
$$ Medium ValueUtilities
$$ Medium ValueBusiness startup and organizational costs
$$ Medium ValueFree Calculators for Tax Deductions for Self Employed Individuals and Businesses
Mileage Deduction
Eligibility Requirements:
These small business tax deductions are estimates only. May apply at partner level if self-employed. Consult with a tax professional.
S Corp Tax Deductions (Form 1120-S) - Complete Deduction List
S Corporations offer pass-through taxation while providing liability protection. Essential S Corp tax deductions include:
View IRS Form 1120-S Instructions- Employment agreements
- Payroll records and W-2 forms
- Documentation supporting reasonableness of compensation
- Payroll tax deposits
- Payroll records
- W-2 forms
- Employment credit documentation
Compensation of officers $$$ High Value
Reasonable salaries, bonuses, and other compensation paid to officers who are also shareholders for services provided. The IRS scrutinizes these to ensure they are not disguised dividends, and payroll taxes must be withheld.
Note: Must be reasonable to avoid IRS scrutiny
Salaries and wages (less employment credits) $$$ High Value
Wages paid to employees (non-officers), reduced by any applicable employment tax credits like the Work Opportunity Tax Credit or Employee Retention Credit.
- Repair invoices
- Description of work
- Documentation showing maintenance vs improvement
- Asset purchase records
- Dates placed in service
- Form 4562
- Lease agreements
- Payment records
- Advertising invoices
- Copies of promotional materials
- Digital ad platform statements
Repairs and maintenance $$ Medium Value
Costs to maintain and repair business assets in their current condition, without adding significant value or extending life.
Depreciation $$$ High Value
Deduction for the allocation of asset costs over time based on useful life and depreciation methods.
IRS Publication 946 - DepreciationRents $$$ High Value
Lease payments for business property, equipment, or vehicles used in operations.
Advertising $$$ High Value
Costs for promoting products or services through various media channels.
- Loan agreements
- Interest statements from lenders
- Tax payment receipts
- License documentation
- Original invoices showing debt
- Collection effort documentation
- Evidence of worthlessness
Interest $$ Medium Value
Interest on business borrowings, subject to limitations.
Taxes and licenses $$ Medium Value
Business taxes and licensing fees.
Bad debts $ Lower Value
Uncollectible business debts if using accrual method.
- Plan documents
- Contribution records
Pension and profit-sharing plans $$$ High Value
Contributions to employee retirement plans.
Employee benefit programs $$ Medium Value
Health insurance and other employee benefits.
Other Common S-Corp Deductions
Legal and professional services
$$ Medium ValueInsurance premiums
$$ Medium ValueSupplies
$$ Medium ValueUtilities
$$ Medium ValueTravel expenses
$$$ High ValueBusiness meals (50%)
$$ Medium ValueAmortization
$ Lower ValueDepletion
$ Lower ValueEnergy efficient building deductions
$$ Medium ValueFree Calculators for Tax Deductions for Self Employed Individuals & Businesses
Mileage Reimbursement
For S-Corps, typically via accountable plan reimbursements
The home office deduction is not directly available as one of the standard S Corp tax deductions. However, shareholders may claim this small business tax deduction personally via an accountable plan.
C Corporation Tax Deductions (Form 1120) - Comprehensive Guide
C Corporations are taxed separately from owners and have unique small business tax deductions available:
View IRS Form 1120 Instructions- Board resolutions approving compensation
- Employment agreements
- Payroll records and W-2 forms
- Comparable salary data for reasonableness support
- Payroll records
- W-2 forms issued
- Employment tax returns
Compensation of officers $$$ High Value
Reasonable compensation, including salaries and bonuses, paid to corporate officers for services rendered, subject to IRS reasonableness tests to prevent excessive deductions.
Note: Subject to reasonableness tests
Salaries and wages (less employment credits) $$$ High Value
Wages paid to employees, net of any employment-related tax credits claimed by the corporation.
- Receipts from charities
- Appraisals for non-cash donations over $5,000
- Board approval for large donations
Charitable contributions $$ Medium Value
Donations to qualified charities, limited to 10% of the corporation's taxable income before the deduction.
Note: Limited to 10% of taxable income
IRS Charitable Contributions Guide- Repair invoices
- Work descriptions
- Asset purchase records
- Form 4562
- Property acquisition records
- Units extracted during year
- Cost or percentage depletion calculations
- Lease agreements
- Monthly payment records
- Advertising invoices
- Copies of promotional materials
- Digital ad platform statements
Repairs and maintenance $ Medium Value
Costs to maintain and repair business assets in their current condition, without adding significant value or extending life.
Depreciation $$ High Value
Deduction for the allocation of asset costs over time based on useful life and depreciation methods.
IRS Publication 946 - DepreciationDepletion $ Lower Value
Deduction for the exhaustion of natural resources owned by the corporation.
Rents $$ High Value
Lease payments for business property, equipment, or vehicles used in operations.
Advertising $$ High Value
Costs for promoting products or services through various media channels.
- Loan agreements
- Interest statements
- Tax payment receipts
- License documentation
- Original invoices
- Collection effort documentation
- Evidence of worthlessness determination
Interest $ Medium Value
Interest on business borrowings, limited by rules like Section 163(j) for large corporations.
Taxes and licenses $ Medium Value
Taxes imposed on the business, such as property taxes, and fees for necessary licenses and permits.
Bad debts $ Lower Value
Deductions for uncollectible debts using the reserve method or specific write-off, depending on the corporation's accounting practices.
- Plan documents
- Contribution records
- Benefit plan documents
- Premium payment receipts
Pension, profit-sharing, etc., plans $$ High Value
Contributions to employee retirement plans, including defined benefit and defined contribution plans.
Employee benefit programs $ Medium Value
Expenses for employee benefits like health plans, insurance, and other perks.
Other Common C-Corp Deductions
Amortization
$ Lower ValueInsurance premiums
$ Medium ValueLegal and professional fees
$ Medium ValueSupplies
$ Medium ValueUtilities
$ Medium ValueTravel expenses
$$ High ValueBusiness meals (50%)
$ Medium ValueFilm/TV production expenses
$ Lower ValueBusiness startup costs
$ Medium ValueEnergy efficient building improvements
$ Medium ValueFree Calculators for Tax Deductions for Self Employed Individuals and Businesses
Mileage Reimbursement
For C-Corps, typically via employee reimbursement programs
Home office deduction not applicable at corporate level.