If you ever have a basket full of shopping goods and want to get a rough idea of the sales tax you’ll be paying, here’s a guide for how to quickly and accurately estimate your tax bill.
This depends on the state you are in – some states have rates as low as 0{cab19ad47a04457a33f1142c065ddf840a097fdd0e7408211ca1f6540bc7ad18} (no sales tax), all the way up to nearly 10{cab19ad47a04457a33f1142c065ddf840a097fdd0e7408211ca1f6540bc7ad18}. You can determine your state’s rate by checking a receipt on a recent purchase. The total sales tax will be displayed and usually falls between 5 and 9{cab19ad47a04457a33f1142c065ddf840a097fdd0e7408211ca1f6540bc7ad18}.
(1) Round your purchase to the nearest ten. If your purchase total is $476.99, round it to $480.
(2) Know your state tax rate, and round it to the nearest whole number. This can be as low as 5{cab19ad47a04457a33f1142c065ddf840a097fdd0e7408211ca1f6540bc7ad18}, or as high as 9{cab19ad47a04457a33f1142c065ddf840a097fdd0e7408211ca1f6540bc7ad18}.
(3) Follow these tricks for estimating your tax and total:
5{cab19ad47a04457a33f1142c065ddf840a097fdd0e7408211ca1f6540bc7ad18}:
(a) Divide your purchase total by 10, ie: delete the last zero in the total. So $480 becomes $48.
(b) Now divide by 2. So $48 becomes $24, your approximate sales tax.
6{cab19ad47a04457a33f1142c065ddf840a097fdd0e7408211ca1f6540bc7ad18}:
Follow the steps for the 5{cab19ad47a04457a33f1142c065ddf840a097fdd0e7408211ca1f6540bc7ad18} tax. Now, divide your original amount by 100 (shift the decimal place over by two), so $480 becomes $4.80, or about $5.
Now add this amount to the 5{cab19ad47a04457a33f1142c065ddf840a097fdd0e7408211ca1f6540bc7ad18} sales tax: $24+$5=$29.
7{cab19ad47a04457a33f1142c065ddf840a097fdd0e7408211ca1f6540bc7ad18}:
Same as 6{cab19ad47a04457a33f1142c065ddf840a097fdd0e7408211ca1f6540bc7ad18}, but add the total divided by 100 two times. So $24+$5+$5=$34.
9{cab19ad47a04457a33f1142c065ddf840a097fdd0e7408211ca1f6540bc7ad18}: Divide your total by 10, so $48. Now divide this by 10 again, and subtract: $4.8, or about $5, so $48-$5=$43.
8{cab19ad47a04457a33f1142c065ddf840a097fdd0e7408211ca1f6540bc7ad18}: Follow the same steps as for the 9{cab19ad47a04457a33f1142c065ddf840a097fdd0e7408211ca1f6540bc7ad18} sales tax, but subtract twice: $48-$5-$5=$38.
If you follow these steps, you’ll be able to quickly estimate the tax on any item you’re purchasing.
Here is another common mental math question: how can you quickly estimate, in your head, a fair tip for your waiter or waitress?
Most advice says we should give 15-20{cab19ad47a04457a33f1142c065ddf840a097fdd0e7408211ca1f6540bc7ad18} tip. Here’s how to quickly estimate the top you give to a server.
Let’s say your restaurant bill is $53.
(1) Divide this by 10: $5.30
(2) Multiply this by 2: $10.60, or about $11.00.
(3) The halfway point between these 2 is the 15{cab19ad47a04457a33f1142c065ddf840a097fdd0e7408211ca1f6540bc7ad18} tip, so in this case, about $8.00.
(4) The amount in (2) is a more generous 20{cab19ad47a04457a33f1142c065ddf840a097fdd0e7408211ca1f6540bc7ad18} tip.
Pick an amount between (2) and (3) if your service was extra good.