Four professional financial calculators — loan refinancing, compound interest, freelance rate-setting, and rental property ROI — all in one place, completely free.
What We Offer
Whether you're a homeowner, investor, freelancer, or saver — FinCalc Pro gives you the numbers you need to make confident financial choices.
Switching lenders or renegotiating your mortgage or car loan can save tens of thousands — or cost you money if you do it wrong. Our refinance calculator cuts through the confusion:
Einstein reportedly called compound interest the "eighth wonder of the world." Our calculator shows you exactly how powerful it is over time, with support for:
The most common freelancing mistake is undercharging. Most gig workers base their rate on what an employee earns — ignoring taxes, overhead, and unpaid time. Our calculator factors in:
Before buying an investment property, you need more than the asking price and estimated rent. Our rental yield calculator gives you the full picture:
In-Depth Guides
Understanding the formulas helps you make better decisions — and catch any numbers that don't look right.
Refinancing a mortgage or car loan means replacing your current loan with a new one — ideally at a lower interest rate. Done right, it can save you hundreds per month and tens of thousands over the life of the loan. Done wrong — especially when fees are high or you plan to sell soon — it costs more than you save.
The single most important calculation in any refinancing decision is your break-even point: how many months until your monthly savings fully recover your upfront costs.
If your refinancing costs $4,000 and you save $180/month, your break-even is approximately 22 months. If you plan to sell the property or pay off the loan before 22 months, refinancing is not worthwhile — even if the new rate is lower.
Always include all costs when entering the "Refinancing Fees" figure into the calculator. These typically include:
Refinancing is generally worth considering when: your new rate is at least 0.5–1% lower than your current rate; you plan to keep the loan long enough to pass the break-even point; your credit score has improved significantly since your original loan; or you want to switch from an adjustable-rate to a fixed-rate mortgage for stability.
Compound interest is interest calculated on both your initial principal and the accumulated interest from previous periods. Unlike simple interest — which only calculates returns on your original deposit — compound interest allows your returns to generate their own returns. Over decades, this creates exponential, not linear, growth.
The more frequently interest compounds, the faster your money grows — though the difference between daily and monthly compounding is surprisingly small. What matters far more is your interest rate and how long you stay invested.
A $10,000 investment at 7% over 30 years grows to:
The real wealth multiplier isn't compounding frequency — it's time in the market and consistent monthly contributions.
Someone who invests $500/month from age 25 to 65 at 7% annual returns will accumulate approximately $1.3 million. Someone who waits until age 35 to start the same contributions will have only about $610,000 — less than half — despite contributing for only 10 fewer years. This is the compounding effect in action.
The most damaging mistake freelancers make is pricing their services based on what they used to earn as an employee. If you earned $80,000/year as a salaried worker, you might assume $40/hour covers it. It doesn't — not even close.
As a freelancer or independent contractor, you're responsible for expenses that employers typically absorb on your behalf:
Rental yield is the annual return generated by an investment property, expressed as a percentage of its value. There are three different yield metrics every property investor should understand — they tell you very different things about the same investment.
This is the quick, top-line figure you'll see in most property listings and investment summaries. It ignores all expenses and is useful for comparing properties quickly — but never for making a final decision.
Net yield subtracts all operating expenses — maintenance, property management fees (typically 8–12% of rent), insurance, property taxes, and vacancy losses — from your rental income before dividing by the property price. This is the more realistic and useful figure.
Cash-on-cash return is arguably the most practical metric for leveraged property investors. Unlike yield calculations which use the full property value, cash-on-cash measures your return against only the cash you actually invested — your down payment plus closing costs. It fully accounts for your mortgage payments, making it ideal for comparing leveraged deals.
The capitalization rate measures a property's income-generating potential independent of how it's financed. It's the metric professional investors and lenders use to compare properties on a level playing field — regardless of loan structure or down payment size.
Got Questions?
Refinancing your mortgage is generally worth it when: your new interest rate is at least 0.5–1% lower than your current rate; the monthly savings will recover all closing costs within 24–36 months (your "break-even point"); and you plan to keep the loan longer than that break-even period. Use the Loan Refinance Calculator above to calculate your exact break-even in months.
Compound interest means you earn returns on both your original principal and previously accumulated interest — so your gains generate their own gains. The formula is: A = P(1 + r/n)^(nt), where P is the principal, r is the annual rate, n is the number of times interest compounds per year, and t is time in years. The more frequently it compounds, and the longer the period, the greater the effect.
Start with your desired take-home salary, then gross it up for self-employment taxes (typically 25–35%). Add annual business overhead (software, insurance, equipment). Divide by your effective billable hours — your total hours minus the unpaid time you spend on admin, pitching, and professional development. Finally, add your target profit margin. The result is your minimum viable rate; our Freelance Rate Calculator does all of this automatically.
A gross rental yield of 5–8% is generally considered good in most markets. After expenses, a net yield above 4% is a solid target for residential property. For leveraged investments (using a mortgage), a cash-on-cash return above 8% is considered strong. That said, acceptable yields vary significantly by location — high-growth markets like London or Sydney may have lower yields but strong capital appreciation.
Gross yield is simply your annual rent divided by the property price — a quick comparison figure that ignores all costs. Net yield subtracts all operating expenses (maintenance, property management, insurance, property taxes, and vacancy allowances) before dividing by the property price. Net yield is a far more realistic measure of what you'll actually earn from the investment.
Cash-on-cash return measures your annual net cash flow as a percentage of the actual cash you invested — typically your down payment plus closing costs. Unlike cap rate, it accounts for your mortgage payments, making it the most practical metric for leveraged property investors comparing different deals. Formula: Annual Net Cash Flow ÷ Total Cash Invested × 100.
No. All calculations on FinCalc Pro run entirely in your browser using JavaScript. No numbers you enter are ever sent to our servers or stored anywhere. When you close or refresh the page, all data is gone. We do not use cookies for tracking your calculator inputs.
Our calculators use standard, industry-accepted financial formulas and are designed to produce results consistent with professional financial software. However, results are estimates for informational and planning purposes only. Real-world results may vary due to taxes, fees, market conditions, and individual circumstances. Always consult a qualified financial advisor before making significant financial decisions.