How is a monthly loan payment calculated?

Monthly loan payments use the standard amortisation formula: M = P x [r(1+r)^n] / [(1+r)^n - 1], where P is the principal, r is the monthly interest rate (annual rate divided by 12), and n is the number of months. Each payment covers the month's interest first; the remainder reduces the principal. The Loan Payment Calculator does this automatically.

What is the difference between sales tax and VAT?

Sales tax is collected at the point of sale from the consumer and paid to the government by the retailer. It is common in the United States. VAT (Value Added Tax) is collected at every stage of production and supply, with businesses reclaiming the tax they pay on purchases. VAT is the standard in the EU, UK, and many other countries. Both are ultimately borne by the end consumer, but the mechanics differ significantly.

Are the results financial advice?

No. All calculators provide mathematical estimates based on the numbers you enter. They do not account for your personal tax situation, creditworthiness, country-specific regulations, or other factors a financial adviser would consider. Use these results as a starting point, not a final answer.

Finance and Money Tools

Calculators for loans, interest, tax, and everyday money decisions.

16 tools available

Percentage Calculator

Work out percentages quickly. Find a percentage of a number, what percent one number is of another, and percentage increase or decrease.

Discount Calculator

Work out the final price, the amount saved, and the savings percentage from one or two discounts.

Sales Tax Calculator

Add or remove sales tax at any rate and see the pre-tax amount, tax amount, and total.

VAT Calculator

Add or remove VAT across multiple line items at once. Use a country rate preset, mix rates per line, and get a VAT-return-style breakdown you can export.

Loan Payment Calculator

Estimate the monthly payment on a loan from amount, rate, and term.

Product Pricing Calculator

Calculate the right selling price for your product. Enter cost, packaging, shipping, fees, and target margin to get a recommended price and break-even point.

Service Pricing Calculator

Price a service correctly by entering your labor cost, materials, overhead, and target margin. Get a recommended quote price, cost breakdown, and effective hourly rate.

Freelance Rate Calculator

Calculate the minimum day rate and hourly rate you need to charge as a freelancer. Enter your income target, expenses, and billable days to see the numbers.

Payment Fee Calculator

Calculate payment processing fees for Stripe, PayPal, Square, and custom processors. Work forwards (charge amount to net received) or backwards (net needed to charge amount).

Meeting Cost Calculator

Calculate the real cost of a meeting in salary time. Enter attendees, average salary, and duration to see the total cost - and the annual cost if the meeting recurs.

Late Payment Fee Calculator

Work out the late fee on an overdue invoice: statutory interest, a custom annual or monthly rate, or a flat fee, plus the total now due.

Cash Runway Calculator

Calculate how many months of cash your business has left. Enter your cash balance, monthly revenue and costs to get runway months, runout date, break-even revenue, and a month-by-month projection table.

Compound Interest Calculator

Calculate how savings and investments grow over time with compound interest and regular contributions. Shows final balance, total interest earned, year-by-year table, and real value after inflation. Downloadable CSV.

Debt Payoff Calculator

Compare the avalanche and snowball debt payoff methods across multiple debts. See which method pays off your debt fastest, saves the most interest, and how much extra payments save versus minimums only.

Self-Employment Tax Estimator

Estimate your self-employment tax, income tax, quarterly set-aside, and take-home pay. Covers US (federal income tax + SE tax) and UK (Income Tax + Class 2 and Class 4 NI). Enter income and expenses.

Loan Amortization Schedule

Generate a full monthly loan amortization schedule. Shows principal, interest, and remaining balance for every payment. Enter extra monthly payments to see months saved and interest saved. Download CSV.

About Finance and Money Tools

From working out your monthly loan repayment to calculating how much VAT to add to an invoice, everyday financial decisions are easier when you have the right numbers fast. These free finance calculators cover the most common money calculations people need: loan payments using the standard amortisation formula, sales tax and VAT at any rate, percentage changes, and proportion calculations. All tools run client-side in your browser - your financial data is never sent to any server. Results are estimates based on your inputs; for advice specific to your situation, consult a qualified financial professional.

Who uses these tools?

Borrowers comparing the monthly payment and total interest cost of loans at different rates and terms
Business owners adding or removing VAT from invoices and quotes quickly
Shoppers calculating whether a discount actually represents good value
Freelancers working out what percentage of revenue to set aside for tax
Anyone doing a quick percentage or proportion calculation without opening a spreadsheet

Frequently asked questions

How is a monthly loan payment calculated?: Monthly loan payments use the standard amortisation formula: M = P x [r(1+r)^n] / [(1+r)^n - 1], where P is the principal, r is the monthly interest rate (annual rate divided by 12), and n is the number of months. Each payment covers the month's interest first; the remainder reduces the principal. The Loan Payment Calculator does this automatically.
What is the difference between sales tax and VAT?: Sales tax is collected at the point of sale from the consumer and paid to the government by the retailer. It is common in the United States. VAT (Value Added Tax) is collected at every stage of production and supply, with businesses reclaiming the tax they pay on purchases. VAT is the standard in the EU, UK, and many other countries. Both are ultimately borne by the end consumer, but the mechanics differ significantly.
Are the results financial advice?: No. All calculators provide mathematical estimates based on the numbers you enter. They do not account for your personal tax situation, creditworthiness, country-specific regulations, or other factors a financial adviser would consider. Use these results as a starting point, not a final answer.