iPhone Tax Write-Off 2026: What the IRS Actually Lets You Deduct

Can You Write Off That New iPhone? What Actually Counts as a Business Expense in 2026

"I'll just write it off" is the most expensive sentence in small business tax planning. Here's what that actually means.

I’ve already written twice this month about the iPhone Ultra; once comparing it to the Galaxy Z Fold 8 on pure specs, and once asking whether you actually need a $2,000-plus foldable in the first place. This post is the third piece of that puzzle, and honestly, I think it might be the most important one, because I keep hearing the same sentence from people justifying the purchase; “It’s fine, I’ll just write it off”.

I need to stop you right there, because that sentence is doing a lot of heavy lifting.

What “Write It Off” Actually Means, Legally

Here’s the first thing that needs to be said plainly; the IRS does not let you deduct 100% of a phone’s cost just because you occasionally answer a work email on it. A cell phone is classified as mixed-use property, meaning it’s assumed to serve both personal and business purposes unless you can prove otherwise.

The deduction you’re actually entitled to is your business-use percentage, not the full purchase price. Unless that phone is genuinely, provably used exclusively for work, you cannot write off the entire cost.

Example:

• Buy a $2,000 iPhone Ultra.

• Document that 70% of your usage is business-related.

• Deduct $1,400, not $2,000.

If your accountant or a YouTube video told you otherwise, it was oversimplified in a way that could get expensive if you’re ever audited.

Section 179 and What’s Actually New in 2026

For 2026, the Section 179 deduction limit is $1,220,000, which phases out for larger operations. For almost everyone reading this, someone wondering about a single phon, this is irrelevant.

Here’s what matters:

• A phone qualifies as equipment under Section 179.

• Instead of depreciating over five years, you can expense the business-use portion in the year you buy it.

• A $2,000 iPhone Ultra at 70% business use gives you a $1,400 deduction in year one.

Sounds appealing, but remember:

• It isn’t a coupon.

• It doesn’t mean Apple gives you money back.

• It only reduces taxable income by the business-use portion.

Even in the best-case 70% scenario, $600 of that phone is still 100% on you.

The Documentation the IRS Actually Wants

This is where most people get careless. The IRS requires substantiation, not vibes. That means:

• 12 months of phone bills, or your annual carrier statement.

• A written, dated business-use percentage estimate, ideally based on a real usage log.

• Evidence the line is actually used for work (like appearing on client invoices or your email signature).

• Consistent reporting year over year (a sudden jump from 70% to 95% use with no explanation is a red flag).

There’s no single IRS-blessed percentage, but most CPAs consider 50% to 80% defensible, if you can show your math.

Why This Matters More Than the Spec Sheet

The “tax write-off” pitch has become the final piece of the manufactured urgency machine:

1. First, you’re told the phone is impressive.

   
   

2. Then, that you’re falling behind if you don’t have it.

   
   

3. Finally, someone says not to worry because you can just write it off.

But the reality is:

• It only reduces your tax burden by a fraction of the cost.

• It only works if you do the paperwork correctly.

• It won’t magically erase the dollars leaving your bank account.

The people I see get burned by this aren’t frauds; they’re the ones who deducted the full price without a usage log and got a very uncomfortable letter from the IRS two years later.

The Question I Keep Coming Back To

In my last piece, I asked you to identify what’s actually broken on your current phone before spending $2,000-plus on a new one. The natural follow-up is:

• Does your business genuinely need this upgrade?

  
  

  • ✅ If yes: use the write-off, document it properly, and sleep easy.

  
  

  • ❌ If no: the write-off is just a story you’re telling yourself to justify the purchase.

Where I Land

A phone is genuinely deductible property, and Section 179 is a real and useful provision for self-employed folks. But run the actual numbers before letting “I’ll write it off” make the decision for you.

1. Track at least two weeks of usage.

   
   

2. Calculate an honest business-use percentage.

   
   

3. Multiply that by the real price tag.

If the math makes sense for your business and your budget, buy the phone with a clear conscience. If the purchase only seems reasonable when you imagine the full price disappearing, that’s marketing talking, not math.

➡️ Related: [Galaxy Z Fold 8 vs. iPhone Ultra]

➡️ Related: [Before You Buy the iPhone Ultra, Ask Yourself What's Actually Broken] 

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Michael Routhier is the founder of Tech 4 Grown-Ups, providing honest, unfiltered digital literacy for adults 55+, and host of The Virtuous Machine, exploring the ethics and human cost of AI. Read by tech-curious readers in 50+ countries. Explore more at tech4grownups.com.