Tool
Where should you park your pesos?
Enter an amount and how long you can lock it. See the best post-tax rate, your real return after inflation, and how to split a large balance to stay PDIC-insured. The gap between a Big-4 bank and a digital one is roughly 50×.
Methodology, formula + sources
How this is calculated
Each product's gross rate is taken from its published rate sheet, then taxed at the 20% CMEPA final withholding (RA 12214) to a post-tax rate. The real return adjusts that for Philippine inflation using the Fisher equation. Products are ranked by the dependable low end of the gross range — promo and boosted rates that need conditions are shown but not used for ranking. First-year interest applies the post-tax rate to your balance, capped where a product limits its earning balance. PDIC laddering splits a balance above the per-bank insured ceiling.
Formula
postTax = gross × (1 − CMEPA%) (CMEPA = 20%) real = ((1 + postTax/100) / (1 + cpi/100) − 1) × 100 (Fisher) earning = min(balance, productCap) interest = earning × postTax/100 (first year, simple) banks = ⌈ balance / PDIC_coverage ⌉ (to stay fully insured)
Constants + data sources (each dated)
| Value used | Source | As of |
|---|---|---|
| CMEPA final withholding tax: 20% on peso deposit interest (RA 12214) | LiveInPH PH deposit-rate ledger | 2026-05 |
| PH headline inflation: 3.0% YoY | Bangko Sentral ng Pilipinas inflation report / Philippine Statistics Authority CPI | 2026 |
| PDIC coverage: ₱1,000,000 per depositor per bank (since 15 Mar 2025) | PDIC, via the deposit-rate ledger note | 2025-03 |
| Top published rate (example): Tonik Digital Bank 12-month Time Deposit — 6.50% gross | Tonik Deposit Interest Rates page | 2026-05-20 |
Worked example (reproduce this by hand)
₱500,000 in a Tonik Digital Bank 12-month Time Deposit at 6.50% gross, 3.0% inflation.
- post-tax = 6.50% × (1 − 20%) = 5.20%
- real = ((1 + 5.20/100) / (1 + 3.0/100) − 1) × 100 = 2.14%
- interest = ₱500,000 × 5.20% = ₱26,000 (first year)
→ 5.20% post-tax, 2.14% real, ≈ ₱26,000 interest. Same numbers in code, ledger, and tests.
Assumptions
- Ranking uses the dependable low end of each gross rate; conditional/promo rates (Maya’s boosted 6%, Security Bank’s promo) reach higher but are not guaranteed.
- First-year interest is simple (no compounding) and ignores MariBank’s upfront-payout mechanic.
- PDIC coverage is PHP 1,000,000 per depositor per bank; the ladder assumes distinct banks or depositors with no offsetting balances.
Known limits — what this does not model
- Does not model early-withdrawal penalties, rate changes over the term, or tax on non-deposit instruments (MP2, bonds, UITFs).
- Big-4 and BPI rows are representative bands — those banks do not publish their regular peso TD rate sheets online.
- Inflation uses the latest headline CPI anchor, not a forecast over the deposit term.