Reference
How each calculator works — inputs, formulas, and what the results mean.
Installment & Credit Card
Philippine banks charge interest on the original principal for the entire term — not on the declining balance. This is the add-on or flat-rate method used across credit card installment programs and most unsecured loans.
The effective interest rate (EIR) is roughly 1.8×–2.0× higher than the stated add-on rate. BSP caps the monthly add-on rate for credit card installments at 1.00% per month (Circular No. 1098, updated by No. 1165).
Installment & Credit Card
Converts existing credit card purchases into fixed monthly installments. You choose a term and the bank applies an add-on rate to your balance.
Cash price, monthly add-on rate (%), term, optional 0% installment amount, optional processing fee, optional monthly budget.
Monthly payment, total interest, factor rate, effective interest rate (EIR), and a side-by-side comparison against any 0% merchant plan you enter. If you provide a 0% amount, the calculator uses binary search to find the optimal bank principal where the bank's total stays just under the merchant's total.
Installment & Credit Card
Converts available (unused) credit limit into cash deposited to your account. Known as Cash2Go (Metrobank), Ready Cash (Security Bank), YourCash (RCBC), or CashLite depending on the bank. The math is identical to Balance Conversion — only the context differs.
Typical rates: 0.49%–1.00% monthly add-on. Terms up to 60 months. Processing fee ₱250–₱500 per availment.
Installment & Credit Card
Standalone unsecured bank loans, separate from credit cards. The key difference is Documentary Stamp Tax (DST) on loan amounts above ₱250,000.
You borrow ₱500K but receive less — and still pay interest on the full ₱500K.
Loans
Reverses the standard loan formula: instead of computing the payment from a loan amount, it finds the maximum loan amount from a monthly budget.
Results appear across multiple terms simultaneously, showing how much more or less you can borrow at each length.
Loans
Puts two bank loan offers side by side across the same set of terms. Compares monthly payment, total interest, total cost including processing fee, savings between the two, and winner at each term. Use this when you have competing offers and want to see the true difference over time.
Loans
Shows the effect of adding extra monthly payments on top of your regular installment. With add-on interest, extra payments reduce the number of months remaining — which reduces total interest paid.
Loans
For developer or dealer direct financing. Handles the distinct structure: a percentage down payment, a loan amount on the remainder, flat-rate monthly payments, and an optional balloon payment due at the end of term.
Common for real estate developers and vehicle dealers offering their own financing, often with higher rates but more flexible credit requirements.
Loans
Computes SSS (Social Security System) salary loan amortization. The SSS charges 10% per annum on the original principal (add-on / flat method), standard term is 24 months.
The effective rate is higher than 10% p.a. because interest is calculated on the full principal throughout the term, not on the declining balance.
Loans
Unlike most Philippine installment products, Pag-IBIG housing loans use declining balance amortization — you pay less interest over time as your principal is paid down.
Additional monthly costs include MRI (Mortgage Redemption Insurance, ~0.25% of loan annually) and fire insurance (~0.10% annually). Rates as of 2024: loans ≤ ₱750K start at 3% for the first 5 years; loans above ₱750K up to ₱6M are at 6.375% fixed.
Loans
Philippine auto loans use add-on (flat) interest. All bank-financed vehicles require a chattel mortgage registered with the LTO — typically 1–2% of the loan amount added to the total cost.
Typical down payment: 20–30% of vehicle price.
Credit & Rates
Converts between flat (add-on) rates and effective interest rates (EIR). Philippine banks advertise add-on rates — the true cost is always higher.
Typical conversions: 0.99%/month flat ≈ 21–23% EIR p.a. — 1.25%/month flat ≈ 27–29% EIR p.a. Outputs flat rate, total interest %, EIR monthly and annual, and factor rate.
Credit & Rates
Finds the term at which a bank installment plan becomes cheaper than a merchant's 0% plan. Merchant 0% plans typically have a marked-up total price. At shorter terms the bank may cost less; as months increase, accumulated interest may push the bank plan past the merchant price. A chart shows the exact crossover point.
Credit & Rates
Compares minimum payments vs. a fixed higher payment for clearing an existing credit card balance. With minimum payments, as your balance drops your payment drops too — making it very slow to clear. A fixed payment stays effective throughout.
Credit cards use declining balance interest (charged on remaining balance each month), unlike installment loans which use add-on / flat rates. Typical PH credit card rate: 24–36% p.a.
Income & Tax
Computes net monthly take-home pay after all mandatory deductions under 2024 Philippine contribution tables and the TRAIN law.
| Annual Income | Tax |
|---|---|
| ≤ ₱250,000 | 0% (exempt) |
| ₱250K–₱400K | 15% of excess over ₱250K |
| ₱400K–₱800K | ₱22,500 + 20% of excess |
| ₱800K–₱2M | ₱102,500 + 25% of excess |
| ₱2M–₱8M | ₱402,500 + 30% of excess |
| Over ₱8M | ₱2,202,500 + 35% of excess |
Income & Tax
Computes income tax for both employed and self-employed / freelancers. Freelancers can compare two methods: the standard graduated brackets, or the 8% flat rate on gross income exceeding ₱250,000. The 8% flat rate is generally better for freelancers earning under ~₱3M per year. The calculator compares both and recommends the lower option.
Planning & Savings
For managing multiple debts simultaneously. Compares two proven payoff strategies: Snowball (smallest balance first — quick wins keep motivation high) and Avalanche (highest interest rate first — saves the most money overall).
Enter each debt's name, balance, monthly rate, and minimum payment, plus your total extra monthly payment capacity. Outputs: months to debt freedom, total interest paid, payoff order, and a month-by-month schedule.
Planning & Savings
Calculates the monthly deposit needed to reach a savings target, with optional compound interest.
Shows milestones at 25%, 50%, 75%, and 100% of goal.
Planning & Savings
Projects whether your current savings rate will cover retirement expenses. Computes your projected fund (current savings + contributions + returns) against the target fund needed to fund monthly withdrawals throughout retirement (present value of annuity formula). If there is a gap, shows how much additional monthly savings would close it.
Planning & Savings
Determines your target emergency fund based on monthly expenses and risk profile, then tracks your progress toward it.
| Situation | Recommended |
|---|---|
| Stable job, no dependents | 3 months |
| Average risk | 6 months |
| Self-employed / variable income | 9–12 months |
Planning & Savings
For OFWs sending money home. Shows the effective exchange rate — the combined impact of the posted exchange rate and the transfer fee, expressed as a single comparable number.
Use this to compare remittance services. A high exchange rate can be offset by a high fee, and vice versa. The effective rate captures both.
Planning & Savings
Projects investment growth with compound returns and regular monthly contributions. Applies the Philippine 20% final withholding tax on gains.
Outputs: final portfolio value, total contributed, total returns, after-tax returns, and a year-by-year breakdown.
All calculations are for reference purposes only. Rates, fees, contribution tables, and regulatory requirements change over time. Always verify details directly with the relevant government agency, bank, or financial institution before making any financial decision.