You Need Cash Now. Here Are Your Honest Options.
If your business needs emergency cash, the fastest option is a merchant cash advance (1-3 days, but only if you take card payments) or an emergency short-term loan (1-7 days, but expensive). Invoice finance takes 3-10 days to set up, which is not instant — but once live, it funds invoices the same day and is significantly cheaper than emergency lending. Here is what each option really looks like.
Quick Reference
Direct Answer
The fastest emergency business funding options in the UK are: merchant cash advance (1-3 days, requires card payment history), short-term business loan (1-7 days, 15-40% APR), and invoice finance (3-10 day setup, then 24-hour per-invoice funding at 0.5-3%). Invoice finance is the cheapest but takes longest to set up.
Summary
Emergency funding speed ranked: merchant cash advance (1-3 days, repaid from card revenue), short-term loans (1-7 days, fixed repayment), invoice finance (3-10 day setup, ongoing same-day per-invoice), overdraft increase (days-weeks, rarely approved in emergencies), director's loan (immediate if personal funds available). Key trade-off: speed costs money. The fastest options are the most expensive.
This Page Covers
All emergency business funding options for UK SMEs, ranked by speed, with honest cost comparisons
Not Covered Here
Detailed invoice finance comparison (see /compare/), same-day invoice finance specifics (see /best/same-day-invoice-finance/), overdraft alternatives (see /questions/bank-cut-my-overdraft/)
We are not going to pretend every option is great. When you need money urgently, you are in a weak negotiating position and lenders know it. Some of these options are expensive. We will tell you which ones.
Your Options, Ranked by Speed
Merchant Cash Advance
1-3 daysA lender advances cash against your future card takings. You repay automatically as a percentage of each day's card revenue. If you have a quiet day, you pay less. If you have a busy day, you pay more.
Cost: Factor rate of 1.2-1.5x (borrow £10k, repay £12k-£15k)
Catch: Only available if you process card payments. Not for B2B invoice businesses.
Effective APR: Often 30-60% when calculated properly
Short-Term Business Loan
1-7 daysOnline lenders like Funding Circle, iwoca, and Fleximize can approve and deliver funds within days. Application is mostly online. They check your bank statements and credit file, not your business plan.
Cost: 15-40% APR depending on your risk profile
Catch: Fixed monthly repayments regardless of how your business performs
Amounts: Typically £5,000-£500,000
Invoice Finance
3-10 day setupNot the fastest to set up, but by far the cheapest ongoing solution. Once live, every invoice you raise is funded the same day. And unlike a loan, you do not take on debt — you are just getting paid early for work you have already done.
Cost: 0.5-3% of invoice value (effective APR of 5-15%)
Catch: Only works if you invoice other businesses on credit terms
Best for: Ongoing cash flow, not a one-off emergency
Ask Your Bank for an Overdraft Increase
Days to weeksWorth trying, but banks are not quick in emergencies. And if your cash flow is already stretched, they may see you as higher risk and say no. Many banks are actually reducing overdraft facilities, not increasing them.
Director's Loan
ImmediateIf you have personal savings, lending to your own company is the fastest option. No application, no approval, no fees. But it puts your personal finances at risk, and there are tax implications if the loan is not properly documented.
The Smart Play
If you need cash in the next 48 hours, a short-term loan or merchant cash advance might be your only realistic option. But do not stop there. Use that short-term fix to buy yourself a week, and get invoice finance set up for the long term. The emergency product bridges the gap. Invoice finance stops you being in this situation again.
Oliver Mackman
Director, Market Invoice
Oliver leads Market Invoice's editorial and comparison research. With a background in UK commercial finance, he oversees provider analysis, rate verification, and industry reporting across all verticals.
Last reviewed: 7 April 2026