What does £5,000 invested actually become?

You enter how much money you're investing into Amazon FBA. The calculator compounds your capital month by month: each cycle (typically 60–75 days from buying stock to Amazon paying you out) your money returns plus a percentage profit, which gets reinvested into the next round of inventory. The headline number is what your initial investment grows to over your chosen time horizon — 12, 24, or 36 months.

ROI per deal is the per-product return on cost — if you buy stock for £10 and net £3 profit after Amazon takes its fees, that's a 30% ROI deal. The annualised return on your CAPITAL is much higher because the same pot of money runs multiple cycles per year. £5k of capital at 30% ROI per deal with a 60-day cycle does 6 cycles a year — so the compounding effective return on capital is dramatically more than 30%.

Two reasons. First, members source at higher ROI on average — we model 30–35% blended account ROI vs 20–25% for a typical solo seller. (Our lead sheet itself averages 40% per deal, but the calculator de-rates that to 30–35% to reflect real-world friction: not every deal you buy works out as expected, some stock ages, returns clip a few points, and most members don't buy ONLY the 40% deals.) Second, capital cycles faster — closer to 60 days vs 75 for solo, because pre-vetted deals sell predictably. More cycles per year AT a higher per-cycle return compounds meaningfully over 12 months.

Yes, with one honest caveat: it assumes you can keep finding deals at the stated ROI as your capital grows. For the first year on £5k of starting capital, that's broadly true — sourcing 30–40% ROI deals to absorb £5–15k of working capital is well within what the UK market supports. By year 2 or 3, when capital might be £30k+, deal-flow ceilings start to bite. You can't only buy the absolute best deals at infinite volume. The calculator gives you the upside; managing the ceiling is on you.

If you're trying to build a business, yes — full reinvestment is what makes compounding work. Every £100 you take out in year 1 is missing capital that would have generated multiples of that by year 3. If you need income from FBA right away, set a withdrawal amount and watch how it slows growth. It's a useful exercise even if you ultimately decide to take less out.

Because cycle time is the variable Amazon sellers actually feel. You buy stock, it ships, it sells, Amazon holds your money, then they pay you. That's your cash cycle — and how often it completes determines how many times a year your capital earns its per-deal ROI. "15% monthly growth" is an output, not a lever. Cycle time IS the lever you can pull — by sourcing faster-moving products, prepping more efficiently, or working an account that gets shorter Amazon payment holds.

Yes — completely free, no signup, no email gate. Built by The Inner Circle FBA. If you want the actual lead sheet behind the IC FBA scenario (50+ pre-vetted 40% ROI deals daily, repricer, founder access, 6-week wholesale masterclass), that's £29.99/month.