Debt Consolidation Calculator – Does It Actually Save Money?

Consolidation Reality Check — Does It Actually Save You Money?

Written by Hamid Ali, MSc Accounting & Finance, ACCA (in progress) · Founder of DebtShift · Updated July 2026

Someone consolidated £14,000 of credit card debt into a personal loan at a lower rate. Eighteen months later, she had the same loan — plus £7,000 back on the cards. Nobody warned her that consolidating debt doesn’t make it disappear. It just moves it, and sometimes makes it worse.

This tool gives you a straight yes or no on whether consolidation actually saves you money — with the exact figure, not a guess.

What This Tool Actually Does

Enter every existing debt — balance, rate, monthly payment — plus the rate and term of a consolidation loan you’re considering. It calculates the total cost of continuing as you are versus the total cost of consolidating, and gives you a clear answer: yes it saves you money, no it doesn’t, and by exactly how much either way.

Who This Is For

Anyone juggling multiple high-interest debts who’s been offered a consolidation loan and wants to know if the headline rate is actually a good deal once the full term is accounted for — not just the lower monthly payment, which can hide a longer, more expensive loan underneath.

How to Use This Tool

List every debt you’re considering consolidating — balance, current interest rate, current monthly payment. Then enter the consolidation loan’s rate and term length. The tool runs both scenarios to the end and compares total cost, not just monthly payment, because a lower monthly figure over a longer term can genuinely cost more overall.

The One Test That Actually Matters

For consolidation to be worth it, the total amount you’ll repay — every payment, over the entire term, plus any arrangement fees — has to be less than what you’d pay continuing with your current debts as they are. That’s it. A lower monthly payment isn’t the test. A lower headline rate isn’t the test. Total cost to zero is the only number that matters.

Real numbers make this concrete. In the UK, a £8,000 personal loan at 7.5% over four years costs about £1,270 in total interest — genuinely cheaper than the same debt spread across cards averaging 23% APR, where minimum payments alone could take over 20 years. But stretch that same £8,000 loan to seven years instead of four, and the interest jumps to roughly £2,260 — a lower monthly payment, but a more expensive loan overall.

In the US, someone with $5,000 spread across three cards at 23%, 25%, and 29% APR paying roughly $170 a month would take around five years and pay about $3,360 in interest continuing as-is. Consolidated into a three-year loan at 15% APR, the monthly payment stays roughly the same but the total interest drops by more than $2,100, and the debt clears two years faster.

Secured vs Unsecured — The Decision That Changes Everything

Unsecured personal loans typically run 6% to 36% APR depending on credit score, usually capped around £25,000/$30,000+, and your home isn’t at risk if you default. Secured loans offer lower rates and larger amounts, but they’re secured against an asset — almost always your home — meaning missed payments can eventually put it at risk. Putting a home on the line for what was previously unsecured credit card debt is a real escalation of risk, not a minor detail. Speak to a free debt adviser before choosing a secured route purely to clear cards.

The Trap Nobody Warns You About

Consolidation only works if you stop using the credit you just cleared. Pay off cards with a consolidation loan and then run them back up, and you end up with the new loan plus fresh card debt on top — genuinely worse off than before you started. This is the single most common way consolidation backfires, and it has nothing to do with interest rates. It’s behavioural, not mathematical, which is exactly why it catches so many people off guard.

When Consolidation Isn’t the Right Move

• Your total debt is small and could realistically clear within a few months of focused budgeting
• You’re already in a formal debt solution — a DMP, IVA, or similar — where taking on new credit usually isn’t appropriate
• You can only qualify at a high rate — if poor credit means your best offer is 25%+ APR, it likely won’t beat what you’re already paying
• You’d need to secure the loan against your home and you’re not genuinely comfortable with that risk

Related Tools

If you’re not sure consolidation beats a structured payoff, run both through the AI Debt Payoff Planner first. And if minimum payments on your current debts are part of the problem, the Minimum Payment Trap Calculator shows exactly what they’re costing you right now.

Frequently Asked Questions

Does debt consolidation hurt my credit score?
It can dip temporarily since applying triggers a hard credit check. Making on-time payments on the new loan afterward, and reducing your credit utilisation by clearing card balances, typically helps rebuild your score over the following months.

Can I get a consolidation loan with bad credit?
Yes, but expect a higher rate — the gap between bad-credit and excellent-credit rates can be more than 25 percentage points. Always check whether the offered rate genuinely beats your current debts before signing anything; a bad-credit consolidation loan isn’t automatically better than what you already have.

Is a 0% balance transfer card better than a consolidation loan?
Often yes, for smaller debts you’re confident you can clear before the 0% period ends — usually 12 to 21 months, with a transfer fee around 1.5-3.5% of the amount moved. For larger balances or longer payoff timelines, a fixed-rate consolidation loan usually works out cheaper overall.

Should I use a specialist consolidation company instead of my own bank?
Compare like-for-like. Specialist brokers can search more of the market, but always check for arrangement fees stacked on top of the interest rate — and never pay a fee-charging firm for something a free charity like StepChange or NFCC offers at no cost.