OSD: The 40% Tax Deduction Most Filipino Freelancers Have Never Heard Of (2026)

Somewhere between the 8% option and full itemized deductions sits a middle path almost nobody talks about: the Optional Standard Deduction (OSD). It lets you deduct a flat 40% of your gross income as expenses — no receipts, no proof, no questions. For the right taxpayer, it's the difference between a shoebox of faded receipts and a one-line computation.

What exactly is OSD?

When you're on graduated rates, your income tax is computed on net income: gross minus deductions. You have two ways to get those deductions:

• Itemized — deduct actual expenses, each one substantiated with receipts and records the BIR can examine.
• OSD — deduct a flat 40% of gross receipts, automatically. Your taxable net income is simply 60% of gross. No expense substantiation needed for the deduction.

OSD is not a special regime — it's a choice within graduated rates. (If you're on the 8% option, none of this applies: 8% has no deductions at all — see our 8% vs graduated guide.)

Who should care about OSD?

OSD matters most to people who can't or didn't choose the 8% option:

• You earn over ₱3M gross a year or are VAT-registered — the 8% option isn't available to you; graduated is mandatory.
• You missed the 8% election in Q1 — you're on graduated rates for the rest of the year whether you like it or not.
• Your real expenses are messy or unprovable — plenty of legitimate costs (cash purchases at the palengke, informal suppliers) never come with receipts. Itemizing what you can't substantiate is asking for audit findings; OSD sidesteps the problem entirely.

OSD vs itemized: the simple rule

If your provable expenses are less than 40% of gross, OSD wins. Example: gross ₱800,000, receipted expenses ₱150,000 (19% of gross).

• Itemized: net income ₱650,000 → income tax ≈ ₱72,500
• OSD: net income ₱480,000 (60% of gross) → income tax ≈ ₱38,500

Same person, same year — ₱34,000 saved just by choosing the flat 40% over the receipts he actually had. If your provable expenses exceed 40% of gross (inventory-heavy businesses, especially), itemized wins instead.

But wait — how does OSD compare to 8%?

If you do qualify for the 8% option, run the numbers before assuming OSD is the play. Same ₱800,000 freelancer:

• 8% option: (₱800,000 − ₱250,000) × 8% = ₱44,000, no percentage tax, done.
• Graduated + OSD: ₱38,500 income tax plus 3% percentage tax (₱24,000) = ₱62,500, plus quarterly 2551Q filings.

For most low-expense service freelancers under ₱3M, 8% still wins — OSD is the fallback for when 8% is off the table, not a replacement for it.

How to elect OSD

You signify the OSD choice on your first quarterly return (1701Q) of the year — and like the regime choice itself, it's locked in for the whole year once made. You can switch between OSD and itemized from year to year, but never mid-year. (Filing walkthrough: our 1701Q step-by-step guide.)

One important catch

OSD removes the need to prove expenses — it does NOT remove the need to record your income. Your gross receipts still need to be accurate, recorded, and consistent with your books of accounts, invoices, and bank inflows. An understated gross with OSD is still an understated gross.

Know your numbers first, choose second

Every choice on this page — 8% vs graduated, OSD vs itemized — is just arithmetic on two numbers: your real gross income and your real expenses. That's what Halin AI keeps for you automatically: chat your sales and expenses (English, Tagalog, or Bisaya), snap receipts, and the Reports page shows your actual totals with tax estimates under each option — so you elect with evidence, not vibes. 100% free during early access — start here.

Disclaimer: Simplified computations for illustration (percentage tax, exact brackets, and special cases vary). Verify current rules at bir.gov.ph and have a CPA confirm the best election for your situation.