Sharesies, Hatch, Kernel: where each one fits in an NZ portfolio

Sharesies, Hatch, and Kernel turned the NZ share market from something Kiwis read about in the Weekend Herald into something you can open on the couch — fractional shares of Apple or Nvidia from $5, an S&P 500 ETF bought in 90 seconds, the full US market in your phone, in NZD, anytime. Most coverage treats it as a straight "which app should I pick?" question. SortMe Founder & CEO Carl Thompson thinks the more interesting tension is that easy access isn't the same as good outcomes — and that the platforms' fee models quietly push different behaviours at you, only some of which build wealth over 20 years. This episode walks through where each of the three platforms genuinely earns its place in an NZ portfolio, the boring research that should silently shape the stack, the FIF tax trap most US investors hit around the $50k mark, and why the biggest mistake isn't picking the wrong app — it's never seeing all three on one screen. In this episode:The one-line job description for each platform: Sharesies as the on-ramp (US + NZ + AU from $5, KiwiSaver built in), Hatch as the deep US route (~6,000 stocks/ETFs in USD, held in your name), and Kernel as the indexer (low-fee NZ-PIE funds at 0.25% p.a. and a low-fee KiwiSaver)The FIF trap that catches Hatch users: if your overseas shares cost basis crosses $50,000 NZD at any point in the tax year, you're taxed under the Fair Dividend Rate method (deemed 5% of opening value, paid or not) — and why a PIE-wrapped Kernel S&P 500 fund sidesteps the conversation entirelyThe unfashionably boring research that should sit silently behind every portfolio decision: S&P's SPIVA scorecard shows 80%+ of active equity funds underperformed their index over the 10 years to December 2025The Barber & Odean study of 66,465 US households: the 20% who traded most earned 11.4% a year, the 20% who traded least earned 18.5% — same market, fewer decisions, seven percentage points more return per year, compounded for 20 yearsWhy the fee model matters more than the fee: transaction-fee platforms (Sharesies, Hatch) earn when you trade more; AUM platforms (Kernel) earn when you contribute and leave it — and which design nudge each one is quietly built aroundThe stack that works for most NZ households: Kernel as the indexed core (KiwiSaver included), Sharesies as the everyday account for smaller regular orders, Hatch reserved for specific US picks sized below the FIF thresholdWhat actually sinks multi-platform households — not the platform mix, but the funding drift: auto-invests switched off in March that never came back on, a $1,000 Kernel monthly quietly sitting at $400, a Hatch USD balance nobody looks at until tax timeCarl's take: "The platforms aren't the problem. Picking the right one for the right job is easy in an afternoon. The problem is the discipline to keep funding them every pay cycle, and the visibility to know when one is out of balance. Both of those are software jobs, not willpower jobs."How SortMe pulls all three onto one screen via Akahu — net worth in NZD across Sharesies, Hatch, Kernel, KiwiSaver, bank and property, with budget auto-allocation that pays the Investing bucket every payday whether you're paying attention or notRead the full article: sortme.com/post/sharesies-vs-hatch-vs-kernel-nz