ISB vs IIM A/B/C: The Salary Where the Cheaper Option Flips

A full fee, opportunity-cost, and loan-financed comparison of ISB's one-year MBA against IIM Ahmedabad, Bangalore, and Calcutta's two-year programs — with interactive sliders for your salary, your assumed raises, your loan, and how long until you're ahead of where you'd have been anyway.

Most comparisons between ISB and the IIMs start and end with admission difficulty or brand pull. Cost is the one variable that actually has a computable answer: what a program costs once you add its fees to the salary you give up to attend it, and at what income that math tips in favour of one over the other. That crossover isn't fixed. ISB packs its MBA into one year; IIM Ahmedabad, Bangalore, and Calcutta spread theirs across two. A shorter program with a higher fee trades against a longer one with a lower fee — and which side wins depends on the salary being given up, the raise you assume you'd otherwise have gotten, and how much of the fee you borrow.

Every chart and table below is interactive — drag the sliders to run the numbers on your own salary, raises, loan, and expected post-MBA offer.

Why the sticker fee is the wrong comparison

ISB compresses its MBA into twelve months; the IIMs spread theirs over twenty-four. Compared purely on fees, ISB's ₹45L looks far more expensive than any IIM's ₹31–32L — but that ₹45L buys one year on campus, not two. ISB is also a private institution and charges 18% GST on tuition and accommodation, a cost the IIMs, as government-classified institutes, don't carry at all.

So what? ISB's fee premium over any IIM is ₹13–14L, and roughly ₹5.3L of that is GST alone — a structural cost of being a private institution that none of the IIMs pay. On living costs: ISB's ₹6.45L figure is its own official estimate for a single year of personal expenses — food outside the mess, a laptop, travel between Hyderabad and Mohali, clothing, and networking — kept separate from accommodation, which is already inside its tuition & fees line. The IIMs' living figures (₹3.5–4.5L) cover the same kind of spending, but over two years, with hostel already bundled into their fee. Per year, ISB's living estimate is genuinely higher than any IIM's — that's what each school's own numbers say a year there costs, not a calculation error.

The other half of the bill: foregone salary

A year spent studying is a year of salary not earned. For ISB's one-year programme, that's one year of your current pay. For a two-year IIM programme, it's two years — and the second of those would typically have paid more, had you stayed employed and kept getting raises. Set the annual raise you'd assume for that alternate path below; it feeds every calculation from here on.

See it for your own salary

Every number below is total cost — programme fee plus the salary given up while studying — not the fee alone. That's why the ISB and IIM figures shift as you move the slider: they're recalculated for that salary each time, using the {{ preIncrement }}% raise assumption set above.

Or scan the full range of salaries at once, at the {{ preIncrement }}% raise assumption:

So what? Each column is the fee plus that row's salary times the opportunity-cost multiplier — not the fee alone, which is why every cell in a column changes as salary changes. Below the crossover point an IIM is cheaper; above it, ISB is; the exact number depends on the raise assumption you set above.

Financing with a loan pushes the crossover higher

Set the actual rupee amount you'd borrow — not a percentage of the fee, since ISB and the IIMs have different total costs, so the same loan covers a different share of each. If the amount you enter is more than a school's total cost, it's capped there (you can't borrow more than the program costs). Moratorium is assumed to match each program's length — one year for ISB, two for the IIMs — before EMI repayment begins; set it to ₹0 to see the cash-only picture.

So what? Because ISB's fee is larger, the same rupee loan amount leaves a smaller cash balance to pay upfront — but it also compounds over one year of moratorium instead of two, which partly offsets its larger principal. Compare the "all-in cost" column against "cash-only" to see exactly what the loan adds for each school at your salary. Note this table, like the sections above it, compares pre-tax CTC figures — the way salaries are usually quoted. Section 80E lets borrowers deduct education-loan interest from taxable income for eight years, but only under the old tax regime; it isn't available under the new regime used in the post-tax section below, so it isn't factored in anywhere on this page.

How long until you're actually ahead

Everything above this point compares pre-tax CTC. From here on, figures are post-tax take-home — a different and more literal question: how much money is actually in your hand.

This tracks two running pools of money from the day the MBA would start. Stay-employed pool: every month's post-tax salary, growing at the raise you set above, simply accumulates — nothing is ever spent from it in this comparison. MBA pool: starts negative, down by the cash you pay upfront (the fee minus whatever you loan). During the programme itself you earn nothing, so it stays flat while the stay-employed pool keeps growing — the gap is widest right at graduation. After graduating, your post-tax post-MBA salary (growing at the raise you set below) starts adding in, minus the EMI for as long as you're repaying it. The question below is: after how many years does the MBA pool catch up to and overtake the stay-employed pool?

So what? The IIMs dig a deeper hole before graduation — two years of zero income against the stay-employed pool's raises, versus ISB's one — so even at identical post-MBA offers and loan terms, they typically take longer to cross over. A bigger loan, a smaller post-MBA jump, or a slower post-MBA raise all push the crossover further out for every school; a smaller loan or bigger jump pulls it in. This crossover point is the honest answer to "when am I actually ahead" — it accounts for the fee, the loan interest, the income given up during the programme, and every year of raises on both sides, not just a monthly snapshot.

Placements are close enough not to matter

So what? The widest gap is about ₹1L a year, between IIM Ahmedabad and IIM Calcutta. That's a rounding error next to the cost swings above. If a placement premium were going to justify the more expensive option, it would need to be far larger than anything these four schools actually show.

Which one is cheaper, by salary band