Monthly fit
Subtract essentials, planned saving and a safety allowance from dependable take-home income. Compare the complete new monthly cost with what remains.
Set a stress-tested monthly ceilingCan I Afford That? Check a Purchase Before You Buy
You can afford a purchase when its complete monthly cost fits after essentials and planned saving, its upfront cost leaves a usable cash reserve, and the plan still works in a realistic downside case.
Free to useNo sign-upYour inputs stay in your browser
Run a sixty-second purchase check
Enter the complete monthly cost of the purchase, not only the advertised installment.
Room after purchase$300
This purchase uses 63% of your current flexible room. Upfront cash and total cost still need checking.
Stress-test the complete decisionWhat makes a purchase affordable?
A useful answer needs four checks. Passing only the monthly-payment check can hide depleted savings, a high total cost or a plan that fails after one difficult month.
Cash left afterward
Upfront cost can include a deposit, tax, delivery, setup and required accessories. The purchase should leave accessible cash for essential expenses and surprises.
Measure the post-purchase cash runwayComplete cost
Add financing, fees, operation, maintenance and likely exit cost. A low sticker price or installment does not show what the decision will cost across its useful life.
Calculate the full ownership periodDownside resilience
Test lower income, higher essential costs and an earlier repair. THAT.MY shows the assumptions instead of applying one universal spending ratio to every person and purchase.
Build a realistic purchase stress testStart with the decision in front of you
Each calculator answers a different cost question and explains every assumption.
Personal Loan Comparison Calculator
Compare monthly payments, interest, fees and payoff totals across two loan offers.
Is the lower monthly payment really the better loan?Credit Card Payoff Calculator
Estimate payoff time and interest, then test what a higher payment changes.
How long will this balance follow me?Cash Buffer Check
See how a purchase changes your emergency runway and recovery time.
Will this purchase leave enough breathing room?Debt-to-Income Calculator
Compare current and proposed monthly debt payments with gross income while keeping residual cash visible.
How much income is already committed to debt?Follow a complete affordability pathway
Start with the kind of decision you face, then move between the relevant calculations and guidance.
Affordability basics
Set a personal spending ceiling from income, essentials, saving and risk before a seller or lender frames the decision.
- What is left after essentials and saving?
- Which income figure is dependable?
Financing and borrowing
Compare APR, fees, terms, promotions and future obligations without letting a low payment hide total cost.
- What cash do I receive or avoid paying today?
- What is the complete repayment?
Big purchase decisions
Apply the affordability method to homes, vehicles and other commitments where ownership costs matter as much as price.
- What is the complete monthly cost?
- Which costs arrive outside the payment?
Ownership costs and alternatives
Compare buying with repairing, renting, sharing or choosing a smaller specification across the same useful period.
- What is the net cost over the useful period?
- How often will the item really be used?
The price is only the beginning
THAT.MY puts five parts of a decision on the same page: cash needed now, monthly commitment, financing cost, cost to own and the buffer left afterward.
- Compare offers over the same time period
- Keep fees separate and visible
- Stress-test income and operating costs
- See formulas and assumptions
Learn the method, not a spending rule
Practical guides that show the trade-offs behind the result.
True Cost of Ownership: Costs Beyond the Price
Calculate true cost of ownership by combining purchase, setup, financing, recurring expenses, maintenance and realistic resale value.
Ownership costs · 10 min readCredit Card vs Personal Loan: Compare Costs
Compare a credit card with a personal loan using interest, fees, payoff behavior, repayment certainty and the total amount paid.
Borrowing · 12 min readCash Buffer After a Purchase: How Much Is Enough?
Measure the cash buffer left after a purchase in months of essential expenses, then estimate the time required to rebuild it safely.
Cash planning · 8 min readStress-Test a Purchase Before You Commit
Stress-test purchase affordability against lower income, higher ownership costs and a surprise expense before making a commitment.
Decision method · 7 min readQuestions that can change the answer
Use the calculation that matches the uncertainty in your decision.
Is a low monthly payment enough?
No. A longer term, larger final payment or added fee can reduce the installment while increasing total cost. Put written offers into the installment comparison calculator.
Should I use gross or take-home income?
Use take-home income for household cash flow because it is spendable. Use gross income only when checking a lender-oriented ratio with the debt-to-income calculator.
What if income changes each month?
Base a fixed commitment on a recurring weak month, not the average of a strong year. The irregular income affordability calculator keeps that downside visible.
Explore every affordability resource
Every calculator, guide and topic pathway remains available here. The order refreshes daily so a different decision receives early visibility without removing any route.
Affordability calculators
Use real numbers to test purchases, borrowing, ownership costs and the cash left afterward.
- Personal Loan Comparison Calculator
- Credit Card Payoff Calculator
- Cash Buffer Check
- Debt-to-Income Calculator
- Irregular Income Affordability Calculator
- Car Affordability Calculator
- Home Payment Stress Test
- BNPL Payment Planner
- Deferred Interest Payoff Planner
- Balloon Payment Planner
- Down Payment Trade-Off Calculator
- Repair or Replace Calculator
- Cost per Use Calculator
- Subscription Impact Calculator
- Sales Tax and Fees Calculator
- Rent vs Buy Calculator
- Lease vs Buy Car Calculator
- Cash to Close Calculator
- Extra Loan Payment Calculator
- Balance Transfer Calculator
- Refinance Break-Even Calculator
- Sinking Fund Calculator
- New vs Used Car Calculator
- Appliance Energy Cost Calculator
- Extended Warranty Calculator
- Cash Discount vs Financing Calculator
- Buy Now or Wait Calculator
- Affordability Calculator
- Installment Comparison Calculator
- True Cost of Ownership Calculator
Buying and borrowing guides
Work through one specific decision with original examples, comparisons and practical limits.
- True Cost of Ownership: Costs Beyond the Price
- Credit Card vs Personal Loan: Compare Costs
- Cash Buffer After a Purchase: How Much Is Enough?
- Stress-Test a Purchase Before You Commit
- How to Judge Affordability With Irregular Income
- Preapproval Is Not Your Affordability Limit
- How Much Car Can You Afford? Add Every Cost
- How to Set an Affordable Total Home Payment
- Can You Afford Buy Now, Pay Later Payments?
- Deferred Interest Is Not the Same as Zero Percent
- APR vs Interest Rate: Compare Borrowing Costs
- Can You Afford a Balloon Payment Later?
- Bigger Down Payment or Bigger Cash Buffer?
- Lease vs Buy a Car: Compare the Same Driving Years
- Repair or Replace? Compare the Next Useful Years
- Cost per Use: When It Helps and When It Misleads
- Rent vs Buy a Home: Compare the Same Time Horizon
- Balance Transfer: Fee, Deadline and Payoff Plan
- Refinance Break-Even: When Lower Payments Save
- Sinking Fund: Save for a Known Future Cost
- How Much Can I Afford? A Decision Framework
- The Monthly Payment Trap: Compare Total Cost First
Topic pathways
Follow a complete path from the first affordability question to the relevant tools and guides.
Affordability journal
Use a focused article for a specific price, loan, car, home or ownership question. The order refreshes daily while every article remains directly linked.
- What Belongs in a Total Home Payment?
- Cash to Close and Cash Left After Closing
- Mortgage Preapproval Versus Your Home Budget
- Set a Home Maintenance Reserve by Condition
- Mortgage Points: Calculate the Break-Even Period
- Bigger Home Down Payment or Emergency Cash?
- Plan for Property Tax and Insurance Changes
- Home Payment Stress Test: Four Useful Scenarios
- Out-the-Door Car Price: What It Should Include
- The Total Cost of Owning a Car
- Lease Versus Buy a Car on the Same Timeline
- Repair or Replace an Older Car: A Cost Test
- How to Find a Car Payment That Fits Real Cash Flow
- Budget for Car Insurance, Fuel and Maintenance
- Long Auto Loan Risks Beyond the Lower Payment
- How Much Repair Reserve Does a Used Car Need?
- How to Set a Purchase Budget Before Shopping
- Monthly Payment Versus Total Cost: What to Compare
- Irregular Income: Set a Safe Purchase Limit
- How Much Cash Should Remain After a Purchase?
- Bigger Down Payment or More Savings: How to Decide
- Why Preapproval Is Not Your Affordability Limit
- How to Stress-Test a Major Purchase Before Buying
- When Waiting Before a Big Purchase Makes Sense
- Affordable Price, Unaffordable Life
- APR Versus Interest Rate: Which Number Matters?
- How Loan Term Changes Payment and Total Cost
- Origination Fees and the Cash You Actually Receive
- Credit Card or Personal Loan for a Purchase?
- Why Credit Card Minimum Payments Keep Debt Around
- How to Plan for a Deferred-Interest Deadline
- The Risk of Stacking Buy Now, Pay Later Plans
- How to Check a Balloon Payment Is Affordable
- How to Compare Two Loan Offers Line by Line
- Can I Afford to Pay Off a Loan Early?
- The True Cost of a Phone or Laptop
- How to Estimate Cost per Use Before Buying
- How to Run a Subscription Creep Audit
- Annual or Monthly Subscription: Which Costs Less?
- Repair or Replace an Appliance: What to Compare
- Is an Extended Warranty Worth the Cost?
- How Resale Value Changes Affordability
- Rent Versus Buy for Something Used Occasionally
- Promotional Financing Checklist Before You Sign
- How to Verify a Written Offer Before Paying
- Fees and Add-Ons That Change Affordability
- Use a 24-Hour Pause Before a Major Purchase
- Questions to Ask Before Financing at Checkout
- How to Handle an Emergency Purchase Without Panic
- Final Affordability Checklist Before You Sign
A useful result should be explainable
Inputs stay visible
No hidden credit assumptions and no mystery score. You can change every value.
Cost beats persuasion
We compare total paid and remaining buffer before celebrating a lower payment.
Limits are yours
Results are educational estimates. Your priorities decide what comfortable means.
