However, I have been able to spend some time making minor alterations to the way The Salary Calculator is displayed in some browsers. The original site was built at a time when few computers had widescreen or high-resolution monitors, which is now not the case. When users with widescreen monitors viewed the old layout, bits of the site were displayed very far apart, making it difficult to use.

The new layout is fixed to a width that should be accommodated by almost all browsers, and should provide a better experience to those on widescreen monitors. I would really appreciate any feedback on how the new layout is working for you. At a later date, I’d love to improve the site design further, and to add those extra features you have all asked me for.

Bonuses are typically paid as a one-off extra on top of your usual salary. Your employer will work out what extra deductions (tax, National Insurance and Student Loan) will be required that tax year because of this extra payment, and will add these on top of your usual deductions for that month. Yes, this unfortunately means that you’ll pay a lot of tax, NI and Student Loan that month (boo!) – but some of your bonus will be left for you to enjoy!

For the purposes of displaying the information The Salary Calculator assumes that your salary is normally paid monthly, and shows you what a bonus month would look like compared to a normal month. Similar calculations will be done by your employer if you are paid weekly. To get started, click here to check out The Salary Calculator with bonus payments.

In comparison to last year, when rates for most of us were unchanged, there are a number of differences which will mean that your payslip will be different next month.

The standard personal allowance (the amount you can earn tax-free) is increasing by a thousand pounds to £7,475, but this is mitigated in some way for higher earners by the threshold for 40% tax being lowered to £35,000. Similarly, NI rates increased by one penny in the pound (to 12% and 2%) but the threshold for paying NI increased so lower earners may not be too badly affected.

To see how you’re affected, try out The Salary Calculator with your salary. The details of the figures used by The Salary Calculator are available on the About page.

Useful links:

• HMRC Income Tax info sheet
• HMRC National Insurance info sheet

Tax codes exist because in some circumstances HMRC may adjust your personal allowance, often because of benefits like a company car or private healthcare. They do this by providing your employer with a tax code which indicates what your personal allowance should be.

The usual effect of such an adjustment would be to lower your personal allowance, meaning that you pay tax on more of your income. If you receive benefits such as private healthcare or a company car through your employer, you pay more tax on your salary so that the value of these benefits is also taxed.

Tax codes usually indicate the personal allowance by including a number which should be multiplied by 10 and have £5 added to it to make the personal allowance – e.g. the standard code 647L indicates a personal allowance of £6,475.

• L, P, Y and T codes indicate the personal allowance to be assigned as described above
• K codes indicate the amount by which the taxable income should be increased, if you owe tax on other earnings which should have been taxed
• A BR code indicates you pay 20% basic rate tax on all income
• A D0 code indicates you pay 40% tax on all income
• An NT code indicates you pay no tax

In most cases your tax code will stay the same if you change jobs, so now you can use The Salary Calculator to get a more accurate indication of what a pay rise or a new job would mean to you each month!

Although a lot of people wait until the January sales before making a large purchase, in some cases you might find that it’s worthwhile to buy before the end of the year so that you only pay the lower 17.5% VAT. However, bear in mind that the amount of VAT increase is only small (a little over 2%) compared to the kind of discounts often offered in January sales.

For large purchases, such as a new car, the VAT increase could lead to a significant increase in price so it is worth checking what the VAT increase means for you. Fortunately, over at our sister site The VAT Calculator we have created a simple tool that shows you how much more something will cost if you buy it after the VAT increase. Just enter the current cost (including VAT) and see what the cost changes to with 20% VAT – try out the 20% VAT comparison calculator.

You can learn more about VAT by reading the information here.

Unfortunately, a lot of the figures won’t be confirmed until towards the end of this year, so I have had to make some estimates based on what was described in the Emergency Budget report. For those who want to know, details of the figures I’ve used are below. For those who don’t – you can go straight to the “April 2011″ row of the Salary Calculator for April 2011 values.

Another change announced in the Budget was an increase in standard VAT rate from 17.5% to 20% effective from 4th January 2011. The VAT Calculator has also been updated so you can see what a difference this will make to purchases.

The calculations for the April 2011 values in The Salary Calculator are based on the following assumptions. Under 65 personal allowance increased to £7,475, over 65 allowance increased to £9,940, over 75 allowance increased to £10,090. Threshold of 40% tax lowered to £35,000 from £37,400. National Insurance rates increase from 11% to 12% for basic and 1% to 2% for additional, as set out by the previous government’s budget. National Insurance basic rate threshold increased to £7,475, additional rate lowered to £42,875. All other values unchanged.

Edit (5th January 2011): The values above have been updated with the latest information from the Treasury and the April 2011 calculations have been updated in line with these. The Salary Calculator will be updated again with final values in early Spring 2011, following the budget update.

Store this link in your phone for when you need to check calculations and you’re not near a computer or you only have mobile internet. It’s been designed to fit easily onto a mobile screen and be quicker to download than the normal site. If you have any problems or find that it is not displaying correctly on your phone I would be very interested to know the details – please email with details of the phone you are using and the problem you are having.

They have promised that a new budget will be announced within 50 days, which will include changes to PAYE taking effect from April 2011. These changes will include increasing the income tax personal allowance to reduce taxes for low and middle earners (although not immediately the full increase to £10,000 the Lib Dems wanted), but the employee National Insurance threshold changes the Conservatives put in their manifesto will not be included. However Labour’s planned increase in employer National Insurance will not go ahead, pleasing Conservative supporters.

Full details will not be available until the promised emergency budget, but I promise to make available as soon as possible any relevant changes to The Salary Calculator!

Why is this? In short because the value of a currency is related to how confident investors are in a country’s economy. Historically, hung parliaments in Britain are unable to act as swiftly as majority governments, because consensus must be found by the members of coalition parties – who often disagree on certain principles. These delays in acting may hinder our recovery from the recession – so investors would rather not be holding on to the pound. Of course, if it does lead to a slow recovery (or even the “double dip” recession some analysts have been predicting), then this could continue to hit us in the wallet for months to come – with the effects of the recession continuing rather than abating.

Another area that was to be decided by this election was income tax and National Insurance. As I wrote previously, all the parties had set out in their manifestos their intended changes to the PAYE system. I put these all in the Election Comparison Calculator – which shows you want impact these differences would have on you. With no party yet in charge, it’s not clear what will happen about this – whose policies will be enacted? The Conservatives, who have the largest number of seats, said they would hold an emergency budget to implement some of their changes before next year. We’ll have to wait and see to find out what really happens.

In the Election Comparison Calculator I’ve tried to help show what would happen to your take home pay should we have a change of government. All the details of the calculations performed are underneath the results, explaining what the key differences between the parties are. Of course, your take home pay is not the only thing at stake – all the major parties have put details in their manifestos of how they will make other changes affecting not only your money but other aspects of your life as well.

Over at the BBC they have created a useful election tool called Where they stand. This allows you choose a topic and three parties to compare, and a summary of each party’s manifesto is displayed. You can see at a glance what the major differences are between the parties on the issues you believe are important – be it the Economy, Civil Liberties, Health or Education (amongst others).

Your vote can make a difference, this year more than ever before, so I encourage you to read up about the parties standing in your constituency and vote for who you think would best represent you. See you at the polling station!