Tax-deductible expenses reduce your taxable income and include common personal items like mortgage interest, charitable donations, student loan interest, and medical costs over 7.5% of AGI, plus business-related costs such as advertising, home office, vehicle use, and supplies, but you generally deduct the higher of the standard deduction or your itemized deductions, with specific rules and limits for each.
You can deduct these expenses whether you take the standard deduction or itemize:
Many business expenses are 100% deductible, including advertising, employee wages, rent, supplies, and certain business meals like company parties or meals for the public, while personal deductions like student loan interest or charitable donations (depending on the type) can also be fully deductible for individuals. The key is that the expense must be "ordinary and necessary" for your trade or business or meet specific IRS criteria, often differentiating from the 50% rule for client meals.
These can include, but are not limited to, electricity, gas, water, internet, and phone services. The cost of these services can often be written off, or deducted, from a self-employed individual's taxable income, thereby reducing their overall tax liability.
The IRS allows taxpayers to deduct up to $3,000 of realized investment losses ($1,500 if married filing separately) against ordinary income each year. This deduction applies only to losses in taxable investment accounts and must be realized by December 31st to count for that tax year.
Allowable expenses include your basic office costs such as stationery and the bills you pay on your business phone. Travel costs and staff salaries are also included, as is the cost of a uniform or other appropriate clothing (for example, if you work in a skilled or manual trade).
Miscellaneous itemized deductions are those deductions that would have been subject to the 2%-of-adjusted-gross-income (AGI) limitation. You can still claim certain expenses as itemized deductions on Schedule A (Form 1040), Schedule A (1040-NR), or as an adjustment to income on Form 1040 or 1040-SR.
You can qualify for a cell phone tax deduction from cell phone charges incurred when the mobile phone is being used exclusively for business. There is not an IRS cell phone deduction for self employed people, exclusively. However, you can also deduct additional business expenses that you incur.
The biggest tax mistakes people make include filing late, math errors, incorrect personal info (like Social Security numbers), forgetting deductions/credits (like EITC), misreporting income, not signing forms, and making errors with bank details for direct deposit, all leading to delays, penalties, or missed savings, with using tax software or professionals helping avoid these common pitfalls.
Deductible expenses: Utilities like water bills are typically tax-deductible as business expenses. Non-deductible expenses: If you use water for both business and personal purposes, you'll need to allocate the expenses accordingly to ensure you're only deducting the business use percentage.
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What are the most common tax deductions people claim?
A portion of your utility bills (gas, electric, water) A portion of your rent payments or mortgage interest. Any excess internet and mobile phone usage. Part of your council tax bill.
A taxpayer may deduct the cost of home internet service pursuant to section 162 if the expense is ordinary and necessary in the taxpayer's trade or business.
A capital loss can offset ordinary income up to $3,000 per year if no capital gains are available. Unused losses above the $3,000 limit can be carried forward to future tax years. The "wash sale" rule disallows deductions if you buy back a sold stock within 30 days.
Situations where you can claim on tax without receipts
A recent tax law ("One Big Beautiful Bill") introduced a new $6,000 bonus deduction for Americans aged 65 and older, available for tax years 2025-2028, reducing taxable income, not the tax itself, with income phase-outs starting at $75,000 MAGI for singles and $150,000 for joint filers. This deduction adds to existing standard deductions, provides up to $12,000 for couples, and requires a Social Security number and filing status other than Married Filing Separately.