There’s something about coming back from holiday, full of chips, ice cream and time to think, that makes September feel more like a fresh start than January.
The return to work and school routines is a good opportunity to look at where your money is going, cancel things you no longer use and tackle the financial jobs that have been sitting at the bottom of your list.
It’s also worth checking what your money is supporting. Your bank, energy supplier, pension and investments can all help fund positive change, or industries you would rather avoid.
You don’t need to overhaul everything at once. Pick one of these seven sustainable money jobs and start there.
1. Your spending
Spent more than planned over summer? Join the club.
Start by looking through the past three months of bank and credit card statements. Cancel subscriptions you have forgotten about, check for price rises and make a realistic plan for the rest of the year.
If you struggle to save what is left at the end of the month, consider moving a small amount on payday instead. Moneybox, Plum and Chip are among the auto-saving apps we compared for 2026, although charges and the way your money is protected vary between products.
Food waste is another expensive place to look. WRAP says the average UK household of four throws away edible food worth around £1,000 a year. Planning a few meals, checking the fridge before shopping and freezing food before it goes off could save more than any clever budgeting hack.
Apps such as Too Good To Go offer surplus food from local shops, cafés and restaurants at reduced prices, while Olio allows people and businesses to give away food and household items locally. Recipe boxes can help with portioning, but they are rarely the cheapest option, so compare the full price once any introductory offer ends.
2. Your mobile phone contract
If your phone still works, keeping it and moving to a SIM-only deal will usually cost less than paying for another handset. It also keeps a working device in use for longer.
For a greener SIM-only option, Ecotalk offers monthly plans with no annual price rises and uses some of its income to support nature restoration. Meaningful Planet directs 10 per cent of customer bills towards UK nature projects and offers rolling and fixed-term plans. Both use EE’s underlying network. Giffgaff is a more mainstream option running on O2. It is a certified B Corp and encourages customers to buy refurbished phones or recycle old devices.
Before switching, use Ofcom’s Map Your Mobile to check which underlying network performs well at home, work and other places you regularly visit.
3. Your energy supplier
This one is worth sorting before the heating goes back on.
From 1 October, Ofgem’s price cap will rise by four per cent for a typical dual-fuel household paying by direct debit, taking the illustrative annual bill from £1,663 to £1,723. The cap limits unit rates and standing charges, rather than a household’s total bill.
If you’re on a standard variable tariff, compare fixed deals using your actual annual consumption. Check the unit rates, standing charges, tariff length and exit fees.
A fix can provide certainty, but it could leave you paying more if prices fall.
For green credentials, the four suppliers awarded Which? Eco Provider status for 2026 are Good Energy, Octopus Energy, Ecotricity and 100Green. All received full marks in its assessment of renewable energy buying and selling and greenhouse gas emissions.
The right choice will depend on price and how you use energy. Octopus offers several smart and electric vehicle tariffs, while Good Energy, Ecotricity and 100Green have more specialist renewable energy models.
Be wary of suppliers that rely mainly on buying certificates to label standard electricity as green without investing meaningfully in new renewable generation.
4. Your savings
Before investing, deal with expensive debt and try to build an emergency fund. A good rule of thumb is to keep three to six months of essential outgoings in an instant-access account, although any amount you can put aside will help.
Then check the interest rate and ethical record of the bank holding your money.
Our best ethical savings accounts for 2026 include specialist providers such as Triodos Bank, Ecology Building Society and Charity Bank, which use deposits to support social or environmental lending. Other options include mutuals such as Coventry, Nationwide and Yorkshire Building Society, Sharia-compliant Gatehouse Bank, Tandem Bank and local credit unions.
If tax on savings interest is a concern, compare our top ethical Cash ISAs. The overall ISA allowance remains £20,000 for 2026/27. From April 2027, the Cash ISA limit is due to fall to £12,000 for people under 65, while the overall limit will remain £20,000.
Eligible deposits are now protected by the Financial Services Compensation Scheme up to £120,000 per person, per authorised firm. Check whether different banking brands share the same licence before assuming each account has separate protection.
5. Your investments
Investing is suitable for money you can leave alone for at least five years. It should come after building an emergency buffer and clearing expensive short-term debt.
A Stocks and Shares ISA allows you to invest within the £20,000 annual ISA allowance without paying UK Income Tax or Capital Gains Tax on returns.
Your investments can fall as well as rise, and you may get back less than you put in.
Our best sustainable investment platforms for 2026 are Simply EQ, Triodos Bank and The Big Exchange.
Simply EQ offers managed Positive Impact, Future Leaders and Sustainable World portfolios. Triodos offers a smaller range of dedicated impact funds, while The Big Exchange lets you choose individual funds or use one of three ready-made bundles.
Wealthify also offers managed Ethical Plans. More confident investors can find sustainable funds through mainstream platforms including interactive investor, AJ Bell and Hargreaves Lansdown, although these platforms also offer conventional investments. The impact of your portfolio will depend on the funds you choose, so check the full holdings, exclusions, fees and sustainability reporting.
6. Your pension
Your pension could become one of your largest investments, but it’s often the account people know least about.
Log in and check which fund you are in, how much you and your employer are contributing, what it costs and where it invests. Many workplace schemes place savers into a default fund, but offer ethical, sustainable or climate-focused alternatives.
NEST’s Ethical Fund is a useful workplace option, while Aviva offers a broad choice of sustainable funds through some workplace and self-select pensions. For personal pensions, our 2026 ethical pension guide includes the PensionBee Climate Plan, Penfold Sustainable Plan and Wealthify Ethical Pension.
Interactive investor, Hargreaves Lansdown and AJ Bell offer SIPPs for people who want to choose their own sustainable funds.
Switching funds within your existing workplace pension may be simpler than moving the whole pot. Think carefully before transferring an older pension, as you could lose guarantees, valuable benefits or lower charges. Regulated financial advice may be sensible if the pension includes safeguarded benefits or you are unsure what to do.
7. Your current account
Your current account may not hold much money for long, but your choice of bank still matters. Banks use deposits and other funding to support lending and investment across the economy.
Our best ethical current accounts for 2026 include Triodos Bank, The Co-operative Bank, Nationwide, Cumberland Building Society and Starling.
Triodos has the clearest positive-impact model and publishes details of the organisations it finances, although its account costs £3 a month and does not offer an overdraft.
The Co-operative Bank combines a long-standing ethical policy with more familiar high street banking features. Nationwide and Cumberland are member-owned mutuals, while Starling offers convenient digital banking and no direct fossil fuel project finance, but has less of a positive-impact focus.
Check fees, overdraft costs, branch access and app features before choosing. If the new provider participates in the Current Account Switch Service, it will transfer your balance and regular payments and close the old account within seven working days.
Once these basics are sorted, you can apply the same approach when your mortgage or insurance comes up for renewal. Our latest guides cover responsible mortgage providers and ethical home insurers. Price, suitability and cover should come first, followed by the provider’s wider impact when the practical choices are reasonably close.
Seven jobs may sound like a lot. Pick the one that could make the biggest difference to your finances and give yourself an hour to deal with it. September is a reset, not a deadline.
