Specialist tax calculators for your website.
Twenty-one tools: qualified small business stock, the sale of a company, net unrealized appreciation, charitable bunching, and the backdoor Roth. Each opens in a small window on your site, with its sources and the date it was reviewed, in plain English. No account needed. Each ends by telling the reader to talk with a professional who knows their whole situation. No account needed.
Put these on your siteTry it: QSBS Exclusion Calculator (opens in a new window)
Where a link goes
- Your resources page, beside the guides you already link to.
- An article that raises the question the calculator answers.
- The email you send a client before a meeting.
Paste it into an article, a resources page, or an email. The calculator stays here, kept current. Every tool below has its link ready; choose once whether copied links open the minimalist window or the full page.
All 21 tools
Saving while you work
Backdoor Roth Pro-Rata Calculator
Works out how much of a Roth conversion is taxable when you also have other pre-tax IRAs.
How Much Can I Save This Year?
Adds up how much you can put into retirement and health savings accounts this year, at your age.
Estimated Tax Safe Harbor
Tells you how much tax you must pay in during the year to avoid the underpayment penalty, and how to close any gap.
Employee Stock Purchase Plan (ESPP) Calculator
Shows what the shares you bought through your company's stock purchase plan are worth after tax, sold now or after the qualifying date.
Your house and your mortgage
How Much Umbrella Coverage Do You Need?
Sizes an umbrella liability policy from what a lawsuit could reach: your net worth outside retirement accounts plus a share of your future income, less what your auto and home policies already cover.
Taxes in retirement
Charitable Bunching Calculator
Compares giving to charity a little every year with giving several years' worth at once, to see which saves more tax.
Capital Gains Harvesting Room
Shows how much investment gain you can take this year at a zero percent tax rate, and what a larger gain costs.
Capital Gains and Your Tax Rate
Shows the tax rate on your next dollar of gain and on your next dollar of ordinary income, and which one pushes the other.
Divorce
Dividing Retirement Accounts in Divorce
Shows what each spouse's share of the retirement and investment accounts is worth after tax, at each spouse's own tax rate.
Estate and inheritance
Illinois Estate Tax Calculator
Estimates the estate tax Illinois and the federal government would charge on what you leave behind.
Portability Election Calculator
Shows what filing an estate tax return at the first spouse's death, to carry over their unused exclusion, is worth to the survivor.
Gift Tax Return Checker
Tells you whether a gift needs a gift tax return, and how much of it counts against your lifetime exclusion.
Step-Up in Basis Calculator
Shows the new tax cost of an asset after a death, and how much profit is never taxed because of it.
Trust Income Tax Brackets
Shows how much federal income tax a trust pays on income it keeps, and how that compares with a person paying tax on the same money.
Distribute or Retain? Trust Income Calculator
Compares the tax if a trust keeps this year's income with the tax if it pays the income out to the beneficiary.
Inheritance in Trust or Outright: The Tax Drag
Shows the yearly tax cost of leaving an inheritance in a trust that keeps its income, compared with leaving it outright to the heir.
Net Unrealized Appreciation Calculator
Compares the tax on taking company stock out of a 401(k) with a special election against rolling it into an IRA.
Selling a business
QSBS Exclusion Calculator
Shows how much profit from selling stock in a small company can be excluded from tax, and what the rest costs.
Installment Sale of a Business
Shows the tax each year when a business is sold for a down payment and a note, and how much tax that pushes past the year of sale.
Asset Sale or Stock Sale? The Double Tax on a C Corporation
Compares what you keep from selling your C corporation's assets against selling its stock, and shows the price that would make the two equal.
Purchase Price Allocation: What the Seller Keeps
Splits the price of your business among its assets the way the tax form does, and shows the tax on each part and what you keep.
Or take the whole set as one post
One post with the calculators above. Paste it into a new post as it is, or rewrite the introduction in your voice.
A ready-made post for your blog, with 3 of the calculators above.
Make the introduction your own. Adapt the post as you like; we keep the calculators up to date.
Filled in, the first sentence of the post is yours: “At your firm, these calculators show the arithmetic behind the questions we hear most.”
- 1Open Posts, then Add New, and give the post a title.
- 2Add a Custom HTML block (type /html). In the classic editor, use the Code tab.
- 3Paste, preview, publish. Do this as an administrator.
On a phone? Email this page to yourselfText it to yourself
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3 of 21 tools are included. Change which ones
Saving while you work
Your house and your mortgage
Taxes in retirement
Divorce
Estate and inheritance
Selling a business
Why firms put these on their sites
- It ends with you
- Every tool closes by telling the reader to talk with a professional who knows their whole situation. The reader is on your site, so the next step is your door.
- Something to do, not just read
- A visitor who runs their own numbers stays longer than one who reads, and the number they get is the question they bring to you. Every figure traces to a statute, regulation, or agency release, and when the law moves, it changes here.
- In plain words
- Every tool opens with a plain-English line on what it does and where it stops, so visitors use it without help and know its limits.
Built by Joshua Mangoubi, CFA, MBA. Joshua is a financial adviser who likes building things that help people think clearly about money. We hope these are useful to you and your clients. The tools are educational estimates from primary sources, not advice. Corrections are welcome through the contact page.
Terms. Cite any page, quote any figure with the year attached, or use the links above with the attribution left as it is; add nofollow or any other attribute to the links if you like. No reciprocal link, ever. All 19 professional shelves.