You can rarely write off 100% of a personal phone bill, as the IRS requires you to deduct only the percentage used for business. You must determine the percentage of time or data used for business versus personal, and only claim that portion. A 100% deduction is generally only allowed if you have a dedicated second phone used exclusively for business.
For example, if you use your phone 60% for work, you can deduct 60% of your bill. You can also deduct the cost of a new phone, accessories, and additional charges incurred during business trips, but only the business-use portion is deductible.
Electricity and Gas Write-offs
The amount of the write-off for these utilities is determined by the percentage of the home that is used for business purposes. For example, if 20% of your home is used for business, you can write off 20% of your electricity and gas costs.
Avoid 100% claims unless you truly have a separate business-only contract. What if I use my personal mobile for business calls? You can still claim the business proportion of your monthly bill. Keep a note of how many calls are business-related to justify your percentage.
If you take a tech deduction, the IRS may ask for documentation—receipts, canceled checks, invoices, or bank records—for the expenses.
100% write-offs, primarily through bonus depreciation, allow businesses to immediately deduct the full cost of qualifying new and used assets (like equipment, machinery, vehicles, and certain improvements) in the year they're placed in service, rather than depreciating them over years, significantly boosting cash flow and lowering taxes, with recent laws making this 100% deduction permanent for assets acquired after January 19, 2025. This is a major tax incentive under recent legislation, often used alongside Section 179 expensing, which offers its own high deduction limits, notes Forbes.
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.
The IRS $600 rule refers to a change in reporting requirements for third-party payment apps (like Venmo, PayPal) for taxable income from goods and services, where platforms must send a Form 1099-K if you receive over $600 in a year, intended to capture gig economy/side hustle income, though delays and phased implementation have adjusted the timeline, with current rules for 2024 using a higher threshold ($5,000) before fully phasing to $600 for future years, but remember all taxable income, regardless of form, must always be reported.
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.
The IRS doesn't have a specific dollar limit for hobby income; instead, it focuses on profit motive: if you intend to make a profit, it's a business, but if it's for fun, it's a hobby, and you must report all income but can't deduct losses. Key is that you report all hobby income on Form 1040 as "other income," and if net earnings from self-employment are $400 or more, you owe self-employment tax, even if it's a side gig. The main difference from business is that you can't deduct hobby expenses (under current law) and must report all profits.
Under the 3½-month rule, a taxpayer may treat economic performance as occurring with respect to a service liability when payment is made, as long as the taxpayer reasonably expects the person providing the services to provide them within 3½ months after the taxpayer makes the payment.
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.
For example, many freelancers who rely heavily on home internet may deduct 50% or more of their internet bill. Light work use would require a lower percentage. Keep in mind that if you are a W-2 employee, you cannot deduct any portion of your home internet bill from your taxable income, even if you work from home.
The IRS uses a combination of automated and human processes to select which tax returns to audit. Not reporting all of your income is an easy-to-avoid red flag that can lead to an audit. Taking excessive business tax deductions and mixing business and personal expenses can lead to an audit.
If you itemize, you can deduct these expenses:
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.
Common work-related mobile phone tax deductions include:
Whether you lost your receipts, they were damaged, or you simply don't have them, there are several documents you could use as evidence to answer an IRS audit when you have no receipts: Calendar logs of meetings/travel/daily tasks. Canceled checks. Credit/debit card statements.
Unreported income
The IRS receives copies of your W-2s and 1099s, and their systems automatically compare this data to the amounts you report on your tax return. A discrepancy, such as a 1099 that isn't reported on your return, could trigger further review.