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Theo Marlow

Theo Marlow is the editor of Side Margin, a site that answers practical questions about money, home, and tech with sourced, plain-English guides. Every article is researched with AI tools, then read, edited, and fact-checked by a human before it is published.

FSA vs HSA: The 2027 Numbers and the Five Rules That Cost People Money

September 15, 2026September 14, 2026 by Theo Marlow
FSA vs HSA 2027 limits of $4,500 self only and $9,000 family, with the health FSA figure not yet published

2027 HSA limits are final, the 2027 FSA limit is not out yet, and the catch-up age is 55 rather than 65. Plus the one case where the FSA is the better account.

Categories Money

Windows 10 End of Support: The October 2026 Deadline Moved and Microsoft Barely Said So

September 15, 2026September 14, 2026 by Theo Marlow
Windows 10 end of support moved from 12 October 2026 to 12 October 2027

Consumer security updates now run to 12 October 2027, not 2026. Microsoft announced it by editing a blog post, and its own support forum still gives the old date.

Categories Tech

Obamacare and ACA Subsidy in 2027: What the 15% Premium Increase Does to Your Bill

September 15, 2026September 13, 2026 by Theo Marlow
ACA subsidy example showing a $65,000 earner in Indianapolis paying $316, then $477, then $546 a month

The median proposed 2027 increase is 15%, the 400% cliff is back at $63,840, and two rules everyone is warning you about were struck down in court.

Categories Money

Medicare Part C: The One-Way Door Nobody Mentions in October

September 15, 2026September 12, 2026 by Theo Marlow
Medicare Part C and the six month Medigap open enrollment window that never repeats

Medicare Part C is easy to join and hard to leave. Your Medigap open enrollment lasts six months and never repeats, the January to March window is not guaranteed-issue, and only four states protect you every year.

Categories Money

Estimated Tax Payments 2026: The Safe Harbor Rule That Stops the Guessing

September 15, 2026September 11, 2026 by Theo Marlow
Estimated tax payments safe harbor: 100% of last year's tax, or 110% if your 2025 AGI was over $150,000

The September 15 deadline for estimated tax payments is not the cliff it looks like. Pay 100% of last year’s tax and you cannot be penalised, the penalty is 7% interest rather than a fine, and Schedule AI can erase it entirely for uneven income.

Categories Money

Leveraged ETFs: What 3x Funds Actually Do to Your Money

September 11, 2026 by Theo Marlow
Card explaining that a leveraged ETF is a one day instrument and loses value on a flat index

A 3x leveraged ETF aims to return three times its index for one trading day, then resets. That single fact explains why a flat market can still cost you money.

Categories Money Tags Saving Money

Tipped Minimum Wage in 2026: What Servers Actually Earn Per Hour

September 10, 2026 by Theo Marlow
Card comparing the federal tipped cash wage of $2.13 an hour with the $16.94 median that already includes tips

A server can legally be paid $2.13 an hour, and the national median for waiters is $16.94. Both are true. Here is how the tip credit works, what your state changes, and where the pressure at the checkout screen actually comes from.

Categories Money Tags Saving Money

Tesla Cybercab vs Uber in Austin: What a Ride Actually Costs in 2026

September 9, 2026 by Theo Marlow
Card showing that 45 Cybercabs serve the Austin metro and wait times ran from 30 minutes to over an hour

Cybercab rides opened to the public in Austin on 4 September. Two price checks the same week pointed in opposite directions, and every fare figure in circulation is an app quote rather than a paid ride.

Categories Tech Tags cybercab, elon, elonmusk, musk, tesla, uber

Extra Help Medicare Drug Costs: What You Pay in 2026

September 9, 2026September 9, 2026 by Theo Marlow
Extra Help card showing the 2026 generic and brand-name drug copayment ceilings

Extra Help pays your Part D premium and deductible and caps each prescription at $5.10 generic or $12.65 brand. The 2026 resource limit is nearly double the Medicare Savings Program limit, which is why being over for one says nothing about the other.

Categories Money Tags Saving Money

SNAP Benefits Changes: The New Amounts From October 1

September 8, 2026 by Theo Marlow
SNAP benefits changes card showing the new maximum monthly allotments for one and four person households from 1 October

SNAP benefits change every October 1. Here are the new maximum allotments, both income tests, and the resource limit most people get wrong.

Categories Money Tags Saving Money
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