How Amazon Prime Day and flash sales can blow your budget

Amazon Prime Day is back, with millions of shoppers expected to snap up deals between 23 and 26 June.

The annual sales event is one of the biggest shopping dates in the calendar, with discounts available for a limited time only. This year, Amazon has even moved Prime Day from its usual July slot to earlier in the summer, giving shoppers another reason to start spending sooner than they might have expected.

But while these deals can save you money on things you were planning to buy anyway, they can also tempt you to spend more than you intended.

And it's not just Amazon Prime Day. From Black Friday and Cyber Monday to supermarket loyalty offers and online flash sales, timed discounts are designed to get us to act quickly before we miss out.

Here's why these sales can be bad for your budget and how to avoid falling into the trap.

Why timed discounts are so tempting

Retailers know that creating a sense of urgency makes people more likely to buy.

Countdown timers, limited-time offers and messages such as "only two left in stock" are designed to make us feel like we need to make a decision right now.

That fear of missing out can be powerful. Instead of thinking about whether we actually need something, we start focusing on the discount and how much we might save.

It's a clever bit of psychology. And it works.

The trap of thinking you're saving money

One of the easiest mistakes to make during a sale is convincing yourself you're saving money when you're actually spending it.

Say you've spotted an air fryer reduced from £100 to £60. It feels like you've saved £40. But if you weren't planning to buy one in the first place, you've still spent £60.

That's why it's worth asking yourself one simple question before clicking 'buy now': would I have bought this if it wasn't on sale?

If the answer is no, the discount may not be saving you money at all.

Small purchases soon add up

Prime Day and other flash sales rarely encourage people to buy just one thing.

You might log on to replace a kettle and end up adding a discounted set of headphones, some storage boxes and a gadget you've never heard of before but suddenly can't live without.

Individually, the purchases don't seem too expensive. Together, they can leave a much bigger dent in your bank balance than you expected.

That's especially true if money is already tight and every pound has a job to do.

Buy now, pay later can make things more tricky 

Many retailers now offer buy now, pay later (BNPL) options at checkout.

Spreading the cost can seem like an easy way to make a purchase more affordable. But it can also make it easier to spend beyond your means.

A few sale purchases here and there may not feel like much at the time. The problem comes when all those repayments start landing over the following weeks and months.

What felt affordable in the excitement of a sale can quickly become a headache later on.

Other discount schemes that can affect your budget

Amazon Prime Day isn't the only event designed to get shoppers spending.

Other examples include:

• Black Friday and Cyber Monday sales
• Flash sales on fashion websites
• Supermarket loyalty card promotions
• App-exclusive discounts
• Limited-time voucher codes
• End-of-season sales
• Early-access member deals

Many of these offers provide genuine savings. The challenge is separating the deals you need from the ones you simply don't want to miss.

How to shop sales without overspending

A sale doesn't have to derail your budget. A few simple rules can help keep your spending under control.

Make a list before you start browsing

Decide what you actually need before the sale begins.

Having a list makes it much easier to ignore tempting offers that weren't part of your original plan.

Set a spending limit

Work out what you can realistically afford to spend after covering essentials such as bills, food and other financial commitments.

Once you've reached that limit, stop.

Compare prices

Not every deal is as good as it looks.

A quick online search can help you check whether the item has been cheaper elsewhere or whether the "discount" isn't quite as impressive as it first appears. Tools like CamelCamelCamel, PriceSpy and PriceRunner can really help with this.  

Give yourself time to think

If something wasn't on your shopping list, don't buy it immediately.

Even stepping away for an hour or sleeping on the decision can help you work out whether it's something you genuinely want or whether you've been caught up in the excitement of the sale.

Focus on what you're spending, not what you're saving

Retailers want you to think about the discount.

Instead, think about the money leaving your account.

That simple shift in mindset can make it much easier to resist impulse purchases.