Martin Lewis

Fixed v Discount
How to choose the right rate

Printable VersionAddThis Social Bookmark ButtonEmail Article
Important All changes, updates and new deals go in the Weekly MoneySaving Email
Free, Ad Free and Spam Free!


 

 There are a number of questions I'm constantly asked and “should I go for a discount or a fixed rate?” is one of the biggies.  So here's my answer……

  The Basics: What are Fixed and Discount Rates?
  Fixed or Discount: The Easy Explanation
  Fixed or Discount: A More Advanced Explanation

Ask yourself a question, “which is more important, surety or cheapness?”  In general discount rates are likely to be cheaper, but fixed rates are safer.  Though of course there are exceptions.

Let me start by defining what we're talking about.  


The Basics: What are Fixed and Discount Rates 

Both discount and fixed rates are interest rates given as special introductory offers for mortgages.  They usually last between 1 and 5 years.  During that time it's likely you will be locked into that deal, with stinging penalties if you leave. It's definitely
worthwhile double checking the product details before signing up for anything. 


 
 

A mortgage is the biggest financial commitment you're likely to have therefore getting it right is likely to be the biggest single MoneySaving act.  To make it easier I've written two full guides; the Mortgage guide for first-time buyers and buy-to-let getters and the Remortgage guide for anyone who already has a mortgage.

Mortgage Guide

   

Remortgaging Guide

                    

   


Now a little more detail:

What is a discount rate?

The interest rate you pay is a fixed amount cheaper than the lender's Standard Variable Rate (SVR).  The SVR is a rate set by each lender which moves up and down both with the UK base rates (as set by the Bank of England) and willy-nilly based on the lenders' own competitive reasons.  In other words, it's a rate the lender can do what it likes with, but almost all of the time follows UK interest rates to an extent.

A discount rate works like this, then.  A 1% discount off a Standard Variable rate of 5.75% means you pay 4.75%.  If
UK interest rates increased by 0.25% and the SVR, as is usual, followed it so it is 6%, you'd then be paying 5%. 
 

Some discount rates are discounted off ‘Tracker Rates' not SVRs.  This works in a very similar way, except a tracker rate simply means it tracks the Bank of England rate accurately.  E.g. the tracker rate is always UK base rate + 0.5%, so the lender can't discount it willy-nilly.

So if you have a 1% discount off a tracker rate of base rate + 0.5%, then you will be paying base rate -0.5% (go on, go with the maths, it's not too difficult).

Advanced MoneySavers' note: SVRs

Unfortunately more often the SVR will not move exactly with the UK rates.  So when interest rates rise by 0.25%, the SVR will probably go up by 0.3% - making a tiny little drop more profit for the lender.   When the interest rate drops by 0.25%, the SVR may only drop by 0.2% - again making a tiny little drop more profit for the lender.  Over time these little drops more profit form a huge lake.

What is a fixed rate?

With a fixed rate the rate doesn't change during the special offer period.  It's, well… er….. fixed!  So a fixed rate of 5% for two years means this is exactly what you will pay for two years irrelevant of any changes to UK interest rates or anything else. 

The advantage of a fixed rate is you know exactly what you'll pay during the entire special offer.

Advanced MoneySavers Note: How are fixed and discount rates set?

Discount rates are set on either the SVR or a tracker rate, both of which are primarily dependent on
UK base rates.  However, fixed rates are an entirely different beast.  As a fixed rate lasts a long period, lenders base the rate they set fixed rates for at any one time on long term rates as defined by the City. 

These can be moving in the opposite direction to base rates.  So while the cost of discount rates can be increasing, fixed rates may be decreasing and vice-versa.
  

Fixed or Discount: The Easy Explanation



Usually fixed rates are set at a higher level than discount rates.  

The major advantage of a fixed rate is ‘surety' – the knowledge of exactly what your mortgage repayments will be over the whole of the special offer period.   

Deciding whether to fix is a question of weighing up how important that surety is for you.  I tend to think of this as a ‘how close to the edge' are you?' question. 

Someone who can only just afford their mortgage repayments should not be gambling with interest rates, and therefore will benefit much more from a fixed rate as it means they'll never be pushed over the brink by a rate increase.
Those with lots of spare cash over and above the mortgage will often be better heading for a discount as in the long-run discounts tend to work out cheaper than fixed rates. 

Remember a discount is a little gamble

Beware though.  By taking a discount you are taking a little gamble, all be it one in which the odds are in your favour.  The question to ask yourself, then, is ‘could I afford to lose?'  If you can, go for the discount.  If losing could mean financial disaster, though, stick with the fixed rate.If you do go for a fixed rate then forget looking at what's happening to other mortgage rates during the fixed period.  It's pointless, you'll only regret it.  If you've chosen a fixed rate for surety, then that's what you've got.  Well done. 

Even if in hindsight it may have been cheaper to take a discount, it doesn't mean going for a fixed rate was the wrong decision.  It was the right one for you and for your peace of mind.
 

An Analogy: Heads or Tails
 

If I asked you to call head or tails on a coin toss and said I'll give you £10 if you win, but you only need pay me £1 if you lose, it's a worthwhile bet for you (and I'd be stupid and not worthy of my ‘Money Saving Expert' title).
  • The bet itself doesn't increase your chances of winning, but it does mean the reward for winning is much better than the cost of losing. If we then tossed the coin and you lost, it was still a worthwhile bet.
     
  • The same is true with taking a fixed rate. If you are doing it because with your personal circumstances ‘surety is important' the fact that with hindsight a discount would've been better doesn't make it the wrong decision.

Fixed or Discount: A More Advanced Explanation 


OK.  The above explanation works.  However there is a slightly more sophisticated way to look at this.  If the idea of a ‘sophisticated methodology' scares you, then quite simply stop reading now.  There is no need to read on, it's just a little added extra.
The aim here is to look at the differential between the fixed and discount rates available at any one time.

First of all, remember the following assumes there is no other difference, except the rate and whether it's fixed or discounted.  There should be no MIG, you must have the same deposit and the same fees, the special offer lasting the same amount of time, and the mortgage calculations must both be done on either a daily or annual basis. 

If things aren't identical, then you must factor the impact of these differences into your calculation.

What's the difference?

Let's assume ceteris paribus (that's my A Level economics course coming back to me; it means ‘all other things being equal'), and that these are the mortgage choices:

·
         Two year discount with the current rate at 4.8%
·         Two year fixed rate at 5.5%

The important thing is the difference between the two rates.  In this case it is 0.7%.  Generally when UK interest rates rise they do so by 0.25%.  This means for the discount rate to be more expensive than the fixed rate UK base rates would have to rise three times. 

However, it's also necessary to factor in the time frame. 
For example, if it took the whole first year for base rates to rise three times on average over that year the discount rate would be 0.375% cheaper than the fixed rate.  And if base rates were then stable, for the next year the discount rate would only be 0.05% more expensive.  Over the two years in this case, the discount would still be cheaper overall.

This means it's not just a question of ‘will base rates rise three times?' but ‘when will base rates rise three times?' to make the difference.

The surety differential

Overall this indicates one of the big factors is what I call the ‘surety differential' – how much more expensive a fixed (sure) rate is than the discount (unsure) rate.  In other words, ‘how much are you willing to pay for surety'? 

The more comfortable your finances are the less you should be willing to pay for surety. 
So, in the case of someone for whom even if base rates rose rapidly they wouldn't be in financial difficulties they may only be willing to pay 0.25% for surety (i.e. when the fixed rate is only 0.25% more than the discount rate).  Someone near the brink, though, may need to look at a 0.75% or 1% surety differential before it's worth taking the discount.  



To ensure you stay up to date on this, all changes will be in

The free weekly money tips e-mail


Other Articles You May Be Interested In

Mortgage Guide

Remortgage Guide

Get Mortgage Advice for Free

Mortgage Payment Protection


Ask a Question / Discuss

Fixed v Discount Discussion Link

  
Printable VersionAddThis Social Bookmark ButtonEmail Article

Martins Weekly Money Tips
Two thirds of top tips close within a week!
The weekly e-mail ensures you don't miss out.

Get The Email »
View FAQ's          
It's Free, Ad-Free & Spam Free
  • £5 European flights: Bag a cheap summer break
  • Get 7% on savings: Is it time to fix?
  • 2 for 1 Burger King vouchers: More cheap food deals
  • Free Anti-Virus software: Protect your PC for nowt
This website is based on journalistic research. It does not constitute financial advice. Any information should be considered in regard to specific circumstances. All tips are followed at your own risk and should be followed up with your own research . See Full Terms & Conditions and Privacy Policy (last updated 19.12.06). © Martin Lewis and Martin S Lewis Ltd. 'Martin Lewis' and 'Money Saving Expert' are registered trademarks belonging to Martin Lewis.