How a personal loan's payment is worked out
A personal loan is unsecured borrowing repaid in equal monthly instalments over an agreed term, used for anything from a wedding to a home repair to rolling several smaller debts into one payment. The payment itself comes from the same fixed-repayment formula behind any instalment loan: it covers the interest owed on whatever is still outstanding, then reduces the balance by whatever is left over, so the balance falls a little each month and the interest charged on it falls with it.
Borrow 10,000 at a 12% rate over 36 months and P is 10,000, r works out to 0.01 a month and n is 36; the formula returns a payment of 332.14 a month, adding up to 11,957.15 repaid in total, 1,957.15 of it interest. That figure alone, though, only ever tells half the story on a personal loan, because it says nothing about the one thing that sets these apart from a plain loan calculation: the origination fee.
Origination fees: deducted or added, and why it matters
Many US personal loan lenders charge an origination fee to cover underwriting and processing, typically somewhere between 1% and 10% of the amount borrowed, occasionally as high as 12% at the priciest end. That fee reaches you in one of two ways, and the difference changes both what lands in your account and what the loan really costs.
Deducted from the payout is the more common structure: the fee comes straight off the amount disbursed, so a 10,000 loan at a 5% fee pays out 9,500, while the payment itself is still calculated on the full 10,000 you owe. Added to the loan amount works the other way: if you need 10,000 in hand, the lender lends 10,500 instead, folding the fee straight into the principal so the full 10,000 reaches your account, at the cost of a bigger balance and a bigger payment. The calculator above runs both at once from the same entries, so the "Fee treatment compared" table shows what each path actually costs side by side rather than asking you to work either out by hand.
UK personal loans work differently on this point. Most mainstream UK lenders do not charge an origination or arrangement fee at all, quoting a representative APR that already assumes the full amount reaches your account, so the fee field above is worth leaving at 0% for a like-for-like UK quote.
The true cost of a fee: effective APR
A fee deducted from your payout means you are paying interest on more money than you actually received, and the rate on your paperwork does not show that gap on its own. This calculator solves for it directly: the effective APR is the rate that would have produced the same monthly payment if it had been charged honestly on the cash you actually got, rather than on the face amount of the loan. There is no algebra that rearranges the payment formula to solve for that rate directly, since the rate sits both outside and inside a power on both sides of the equation, so the answer is found the same way the Interest Rate Calculator on this site finds an implied rate: by testing rates between two brackets and narrowing in until the resulting payment matches, a method called bisection.
Take the 10,000 loan at a 12% rate over 36 months again, now with a 5% fee deducted. The payment stays 332.14, calculated on the full 10,000, but only 9,500 actually reaches your account. Solving for the rate that turns 9,500 into that same 332.14 payment over 36 months returns roughly 15.6%, noticeably above the 12% on the paperwork, purely because of where the fee came off. Add the fee to the balance instead and the gap does not disappear; it becomes a bigger payment on a 10,500 balance against the same 10,000 you asked for, which still resolves to an effective APR above 12%, just by a smaller margin. Either way, the fee has a real cost; the two treatments only change how it shows up.
Using a personal loan to consolidate debt
Rolling several existing debts into one personal loan only pays off if the new loan's real cost, effective APR included, actually beats what those debts are costing you now. The fair comparison point is not any single card or loan you hold but the blended rate across all of them together, weighted by how much you owe on each:
List a 5,000 balance at 24% alongside a 3,000 balance at 18% and the sum works out to (5,000×24 + 3,000×18) ÷ 8,000, which is 174,000 ÷ 8,000, a blended rate of 21.75%. A personal loan quoted anywhere near 15-16% clearly beats that blended figure; one quoted at 20% barely does, once its own fee is folded in honestly; one at 24% does not beat it at all, whatever the monthly payment looks like on its own. The "Debt consolidation check" above runs this sum from whatever debts you list and states plainly whether the loan above currently beats the blended rate, not just whether the sticker rate looks lower.
A lower rate is not the whole answer by itself. Extending the term on a consolidation loan can drop the monthly payment while still costing more in total interest over the full term, and a new fee on the consolidation loan itself eats into any saving before a single payment is made. Worth checking the total cost of borrowing above, not only the rate, before treating a lower headline number as a settled win.
What rate might you actually get
Personal loan pricing varies enormously by credit standing, and no calculator can tell you your own rate before a lender actually quotes one. As a rough, deliberately wide illustration of where US rates have recently landed by broad credit band: excellent credit, roughly 750 and above, has recently seen rates as low as the high single digits and averaging in the mid-teens; good credit, roughly 700 to 749, tends to average in the high teens to low twenties; fair credit runs noticeably higher again; and poor credit, below roughly 640, regularly reaches the 30s, with 36% commonly cited as the ceiling most consumer advocates consider an affordable loan can carry. These bands move with the wider interest rate environment and vary by lender, so treat the "Where this rate sits" chart above as orientation, not a quote, and always compare an actual pre-qualified offer rather than an assumption based on a credit tier alone.
Choosing your inputs well
Enter the interest rate from your loan offer or estimate, not a blended figure of your own; the calculator folds the fee in for you rather than needing it pre-mixed into the rate. Choose "deducted" if your lender's disclosure describes the fee coming off the amount disbursed, the more common US structure, or "added" if you need a fixed amount in hand and the lender is financing the fee into a larger balance instead; if you are not sure which your own offer uses, the "Fee treatment compared" table shows both so you can match it against the actual numbers on your loan estimate. A longer term lowers the monthly payment and raises the total interest, exactly as with any instalment loan, so weigh that trade-off against what the monthly budget can comfortably absorb rather than optimising for the payment figure alone.
Questions people ask
Do all personal loans charge an origination fee?
No. Many US lenders do, commonly 1% to 10% of the loan and occasionally up to 12%, but plenty of lenders, especially ones aimed at borrowers with strong credit, charge none at all. Most mainstream UK personal loans do not charge one either. Always check the actual loan estimate rather than assuming a fee applies.
Should I pick fee deducted or fee added?
Whichever one matches how your actual lender structures the fee, this is not a choice you get to make yourself once an offer is in hand. Use the "Fee treatment compared" table to see both, then match the one that lines up with the cash amount and payment on your real loan estimate.
Why is my effective APR higher than the rate I was quoted?
Because a deducted fee means you are paying interest on more money than actually reached your account, and the quoted rate on its own does not show that. The effective APR folds the fee back in against the cash you actually received, so it is the more honest figure for comparing two offers that charge different fees.
Does consolidating debt always save money?
Only if the new loan's effective APR genuinely beats the blended rate across the debts being rolled in, and the term is not stretched so far that total interest grows even as the payment falls. Check the "Debt consolidation check" verdict above rather than assuming a single lower-looking rate settles it.
What credit score do I need for the best rate?
Lenders vary, but excellent credit, roughly 750 and above, tends to unlock the lowest rates on offer, while scores below roughly 640 usually see the highest. The "Where this rate sits" band above gives a wide illustrative range by tier; a genuine pre-qualification from a lender is the only way to know your own rate.
Is the interest rate here the same as APR?
Not necessarily. This calculator treats the rate you enter as the contractual rate charged on the balance, then works out its own effective APR once the fee is folded in against the cash you actually receive. A lender's own advertised APR may already include a deducted fee under its disclosure rules, so compare the effective APR here against the lender's APR, not against its plain interest rate.
Can I use this for a loan with no origination fee?
Yes. Set the fee to 0% and both treatments collapse to the same plain instalment loan, with the effective APR equal to the rate you entered, exactly as a no-fee loan should behave.
These figures are estimates for a simple fixed-rate personal loan, not financial or lending advice. Actual fees, rates and terms depend on the lender's underwriting; check your own loan estimate or credit agreement before treating any of this as final.