Interest on self assessment tax
Assuming you are Resident Indian. As per Indian Income Tax  As per section 208 every person whose estimated tax liability for the year exceeds Rs.   10,000, shall pay his tax in advance in the form of “advance tax”. Thus, any taxpayer   whose estimated tax liability for the year exceeds Rs. 10,000 has to pay his tax in   advance by the due dates prescribed in this regard. However, as per section 207, a   resident senior citizen (i.e., an individual of the age of 60 years or above) not having any income from business or profession is not liable to pay advance tax.   In other words, if a person satisfies the following conditions, he will not be liable to pay advance tax:   Hence only self assessment tax need to be paid without any interest. Refer the full guideline on Income tax website
"I had the same thing happen to my house. I bought it in 2011 for 137,000, which was the same as the FHA appraised value (because FHA won't guarantee a loan for more than their appraiser thinks its worth). January of last year, I get the letter from the tax office and see that my house has been assessed at only 122,000. I was shocked too, until I read a similar document that Phil told you to read. The short of it is, no matter what the tax assessor calls their calculation, it is an assessment. It was mass-produced along with everyone else's in your neighborhood by looking at its specs on paper (acreage, house square footage, age, beds/baths) and by driving by your home to see its general condition. The fact that your lawn may be less well-kept than the last time they drove by could have affected the decision a little. It's very unlikely to have been a major determinant of the assessment. The assessment value affects taxes, and taxes only. It is, in most states, a matter of public record, and so it could be used by a potential buyer to negotiate a lower price. However, everyone in the housing business knows that the assessed value is not the market value, and the buyer's agent will be encouraging their client to make a more realistic bid. This ""assessed value"" is not an ""appraisal value"". An appraisal is done by someone actually walking into and through your home, inspecting the general condition inside and out, to try to make a fair evaluation of what the home is actually worth. That number is almost always going to be more than the assessment value, because it takes into account all the amenities of the home; the current fixtures, the well-kept (or recently-replaced) flooring, the energy-efficient HVAC and hot water system, etc etc. It also takes into account recent comparables; what have other houses, with the same general statistics, the same amenities, relatively close in location, sold for recently? That will still generally be different from the true market value of the home. That value is nothing more or less than what a potential buyer will pay to have it at the time you decide to sell it, and that in turn depends 100% on your potential buyers' myriad situations. Someone may lowball even the assessed value because they're looking for a deal and hoping you're desperate; you just reject the offer. Someone may be looking at comparables indicating the house is maybe overpriced by $10k. You can counter and try to come to an agreement. Or, your potential buyer could work five minutes from your house, and be willing to pay at or above your asking price because the next best possibility is another 10 miles away. Since you aren't looking to sell the home, none of this matters, except to determine any escrow payments you might be making towards property taxes. Just keep making your mortgage payment, and don't worry about it. If you really wanted to, you could petition the state for a second opinion, but you think the value should be higher; if they agree with you, they'll raise the assessed value and you'll pay more in taxes. Why in the world would you want to do that?" It would be quite the trick for (a) the government to run all year and get all its revenue in April when taxes are due and (b) for people to actually save the right amount to be able to cut that check each year. W2 employers withhold the estimated federal and state taxes along with the payroll (social security) tax from each paycheck. Since the employer doesn't know how many kids you have, or how much mortgage interest, etc you will take deductions for, you can submit a W4 form to adjust withholdings.   The annual Form 1040 in April is to reconcile exact numbers, some people get a refund of some of what they paid in, others owe some money.  If one is self-employed, they are required to pay quarterly estimated taxes. And they, too, reconcile exact numbers in April. "The property tax valuation and the fair market price are NOT one and the same.  They track each other, correlate to each other, but are almost NEVER the same number. In some parts of the USA, a municipality has to re-assess property tax values every ten years.  In these places, the tax value of a property is on something like a 10-year moving average, NOT on the volatile daily market price. EDIT:  It is easy to fall into the ""trap"" of thinking that property tax valuation is intended to represent fair market value.  It's INTENT is to provide an accurate (or, as accurate as possible) RELATIVE VALUATION of your property compared to the other properties in the municipality. The sum of all the property values is the tax base of the municipality.  When the town budget (which is paid in part via property taxes) is set, the town simply divides the tax base into the budget total to arrive at the ratio of tax-to-collect, to the tax base, also called the ""tax rate per thousand dollars of valuation.""  i.e. if the town tax base is US$10,000,000, and the town budget is US$500,000, then the ratio is 0.05, or $50 per thousand dollars of valuation.  If your property is assessed at US$100,000, then you would pay 100 x $50, or $5000 in property taxes that year. Since this is the goal of the property tax valuation, NOT deciding what your house is worth on the open market, then we are left with the question of ""why use the market value of a house for property assessment?"" and the answer is that of all the various schemes and algorithms you can try, ""fair market value"" is the easiest and most accurate...IF TIME FLUCUTATIONS ARE TAKEN OUT.  For example, if I buy a house in a development for $250,000 today, and next summer the housing market crashes, and you buy the identical house next door to me for $150,000, it does NOT stand to reason that you should pay less taxes than me, because your house is ""worth"" $100,000 less.  In fact, BOTH our houses are worth $100,000 less. What matters most in property tax valuation isn't the actual number, but rather, is YOUR valuation the same as other essentially similar properties in your tax base?  Getting the RELATIVE ratio of value between you and your neighbors correct is the goal of property tax valuation." As you are in UK, you should think in terms of Tax Free (interest and accumulated capital gains) ISA type investments for the long term AND/OR open a SIPP (Self Invested Pension Plan) account where you get back the tax you have paid on the money you deposit for your old age. Pensions are  the best bet for money you do not need at present while ISAs are suitable for short term 5 years plus  or longer. In some circumstances losses from self-employment can be offset against total income and/or capital gains. If this applies to you may be able to claim back some of the tax taken by PAYE from your day job.  You can also to some extent carry the loss backwards into previous tax years or forward into the next one if you can't use it fully this year. HMRC have some information available on the current rules: When you can claim losses  You can claim: But You can’t claim: I will add one point missing from the answers by CQM and THEAO. When you take a loan and invest the proceeds, the interest that you pay on the loan is deductible on Schedule A, Line 14 of your Federal income tax return under the category of Investment Interest Expense.  If the  interest expense is larger than all your investment earnings (not just those from the loan proceeds), then you can deduct at most the amount of the earnings, and carry over the excess investment interest paid this year for deduction  against investment earnings in future years. Also, if some of the earnings are long-term capital gains and you choose to deduct the corresponding investment interest expense, then those capital gains are taxed as ordinary income instead of at the favored LTCG rate. You also have the option of choosing to deduct only that amount of interest that offsets dividend (and short-term capital gain) income that is taxed at ordinary rates, pay tax at the LTCG rate on the capital gains, and carry over rest of the interest for deduction in future years. In previous years when the tax laws called for  reduction in the Schedule A deductions for high-income earners, this investment interest expense was exempt from the reduction. Whether future tax laws will allow this exemption depends on Congress. So, this should be taken into account when dealing with the taxes issue in deciding whether to take a loan to invest in the stock market. Tax-exempt interest (and dividends attributable to tax-exempt interest) is required to be reported on Form 1040 line 8b (or the analogous line of Form 1040A).  While it is not directly taxed, it does come into play in the calculation of taxable income and various credits.  For example, tax-exempt interest is counted when determining the portion of Social Security benefits to be included in gross income. Not for the amount in the accounts but for the interest you earn per year is taxable. But the sum of your all taxable incomes is under the limit, then you dont need to pay any income tax. The limit is available at wiki here But you should intimate your bank not to deduct TDS (Tax Deducted at Source) by submitting Form 15G/15H (which will be normally available in Bank itself), provided your total interest income for the year will not fall within overall taxable limits. You may calculate your income tax amount at Official website at here