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The Federal Reserve uses a surprise $400 bill as one of its key measures of whether households are financially prepared. Plenty of people can’t clear it. Just 63% of US adults say they’d cover an unexpected $400 expense using cash or its equivalent, and 12% say they couldn’t pay it by any means right now, according to the Federal Reserve’s 2025 Survey of Household Economics and Decisionmaking.
The good news is that $400 is within reach in a few days of steady work — or less with a smart mix of methods. Here are 15 legit ways to make money online, from home or in person, with how long each one realistically takes to add up to $400, based on what the companies themselves publish. Pay figures are current as of September 2026, and your results will depend on your location, schedule and effort.
| Method | The $400 math | Realistic timeframe | Is it online? |
|---|---|---|---|
| Sell items you don’t need | One or two higher-value items, or several smaller ones | 1 day–2 weeks | Yes, but sales are often in person |
| Donate plasma as a new donor | CSL Plasma says new donors can receive up to $800 in month one | Within your first month | No |
| Deliver with Amazon Flex | 16–23 hours at $25 an hour | About a week part time | No |
| Drive for a rideshare or delivery app | About 13 hours on Uber trips or 37 DoorDash deliveries | About a week part time | No |
| Do gig work or odd jobs | 10 TaskRabbit hours at $40 or eight $50 local jobs | Days–2 weeks | No |
| Pick up extra shifts or overtime | About 13 overtime hours at a $20 base rate | 1–2 pay periods | Usually no |
| Babysit | About 15 hours, or one overnight plus about five hours | 1–2 weeks | No |
| Pet sit or dog walk | About 16 hours at $24.91 an hour | 1–3 weeks | No |
| Clean homes or offer household help | About 13 hours at $31.10 an hour | 1–2 weeks | No |
| Open a bank account with a sign-up bonus | One bonus big enough to cover it | Several weeks | Yes |
| Freelance or work as a virtual assistant | One to a few projects, depending on your rate | Under a week–a few weeks | Yes |
| Join paid research studies | Two or three focus groups | Weeks–months | Mostly |
| Check for unclaimed money | Free to search; could be $0 or more | Varies by state | Yes |
| Earn rewards | Rewards vary by offer | After the offer’s eligibility period | Yes |
| Take surveys and complete GPT offers | Many small tasks | Several months | Yes |
How long it takes to earn $400: Could be a day or two if you have one or two higher-value items, like a laptop, gaming console or piece of furniture. Selling smaller items a few at a time can take a couple of weeks.
How it works: Round up electronics, furniture, tools, sports gear and clothes you no longer use. List them on Facebook Marketplace, OfferUp or Craigslist for local same-day sales, or on eBay, Poshmark or Mercari if you don’t mind shipping. In fact, 7% of adults say they’d sell something to cover a surprise $400 bill, according to the Federal Reserve. Pricing to sell, rather than holding out for top dollar, moves items faster.
Is it online? Yes, but the sale often happens in person.
How long it takes to earn $400: Often within your first month. New donors can receive up to $800 in their first month, though amounts vary by location and can change, according to CSL Plasma.
How it works: Plasma centers like CSL Plasma, BioLife and Grifols pay donors after each donation, and CSL and BioLife both run promotions for first-time donors. At CSL, your payment loads onto a reloadable debit card at the end of each donation, and CSL bases your pay on your weight that day. FDA rules cap donations at once in a two-day period and no more than twice in a seven-day period, according to CSL Plasma, so $400 takes several visits.
CSL doesn’t require an appointment. Bring a government-issued photo ID, proof of Social Security and proof of residency, like a lease or a piece of mail postmarked in the past 60 days. CSL generally requires donors to be 18 to 74, weigh at least 110 pounds and have no tattoos or piercings in the past four months. Other centers set their own limits, like Grifols’ 18 to 69. Each donation usually takes about 90 minutes to two hours, according to CSL Plasma.
Is it online? No. You’ll need to visit a center and pass a health screening.
How long it takes to earn $400: About 16–23 hours of delivery blocks, or roughly a week of part-time shifts. Most drivers earn $25 an hour, depending on location, tips and delivery time, according to Amazon.
How it works: You reserve delivery blocks in the Amazon Flex app and deliver packages in your own vehicle. You see what a block pays before you accept it, and you can reserve blocks up to a week in advance. You’ll need to be 21 or older with a valid driver’s license, a qualifying vehicle and a smartphone.
Is it online? No.
How long it takes to earn $400: About a week of part-time driving. US Uber drivers’ median earnings are more than $30 per utilized hour, including tips and incentives, according to Uber, which puts $400 at about 13 hours of trip time. For delivery, DoorDash’s own pay example works out to about 37 deliveries.
How it works: Sign up to drive for Uber or Lyft, or deliver food and groceries with DoorDash, Uber Eats or Instacart. Uber counts only the time between accepting and completing a trip as a utilized hour, so your total time on the app, including waits between rides, will be longer.
With DoorDash, base pay runs $$10 or more per offer, and you keep 100% of customer tips on top, according to DoorDash. Its example of $6 in base pay plus a $5 tip adds up to $11 a delivery. The amount on the acceptance screen is the minimum you’ll earn for that offer. DoorDash pays weekly by direct deposit, usually by Wednesday night, and Fast Pay lets you cash out daily for a fee.
Is it online? No, this is in-person work you book through an app.
How long it takes to earn $400: About 10 hours of booked TaskRabbit work if you charge $40 an hour, or eight local jobs priced at $50 each. It depends on the rate you set and how quickly you land bookings.
How it works: On TaskRabbit, you set your own hourly rate for most categories, like cleaning, moving help and furniture assembly. Taskers keep 100% of the hourly rate they set plus 100% of tips, and most payouts arrive within one to three business days, according to TaskRabbit. Some tasks, like IKEA assembly, pay a fixed amount per task instead.
You can also offer yard work, moving help or junk hauling directly through Nextdoor, local Facebook groups or word of mouth, quoting a flat price per job.
Is it online? No, though you’ll often find the work online.
How long it takes to earn $400: About 13 overtime hours at a $20 base rate, paid over one or two pay periods. If you already have an hourly job, this may be your simplest option.
How it works: Employers must pay covered, nonexempt employees at least one and a half times their regular rate for hours worked beyond 40 in a workweek, according to the US Department of Labor. At a $20 base rate, overtime pays $30 an hour. Some states have their own overtime laws, and when both apply, you’re entitled to whichever standard pays more. Ask your manager for extra shifts or a spot on the overtime list.
Is it online? Usually not, though it depends on your job.
How long it takes to earn $400: About 15 hours at the national average rate, or one overnight job plus about five more hours. Families paid an average of $26.24 an hour for one child and $29.87 for two, according to UrbanSitter’s 2026 booking data.
How it works: Sign up with a platform like UrbanSitter, Care.com or Sittercity, or ask around your neighborhood. Overnight jobs are the shortcut to $400: UrbanSitter’s average flat overnight rate is $285. Rates depend on your city, experience and the number of kids, with UrbanSitter’s city averages running from about $18 to $30 an hour.
Is it online? No, though you often find clients through an app or site.
How long it takes to earn $400: About 16 hours of work before any platform fees. Pet care (including dog sitting, dog walking and cat sitting) averages $24.91 an hour, according to UrbanSitter’s 2026 data.
How it works: List your services on Rover or Wag, or offer them directly to neighbors, for walks, drop-in visits or overnight stays. Multi-day and overnight bookings add up faster than single walks. If you book through a platform, check whether it charges sitters a service fee.
Is it online? No, though you book jobs through an app.
How long it takes to earn $400: About 13 hours of work. Household services like housekeeping, organizing and meal prep average $31.10 an hour, according to UrbanSitter’s 2026 data. That’s more than its $26.24 average babysitting rate for one child.
How it works: Offer cleaning, organizing or meal prep through word of mouth, local community groups or a platform like TaskRabbit. You can charge by the hour or quote a flat fee based on the size of the home.
Is it online? No, though you can advertise and book online.
How long it takes to earn $400: You can apply in minutes, but the bonus pays out only after you meet the bank’s requirements, which can take weeks. Chase, for example, has given new checking customers 90 days to complete its direct deposit requirement, then paid the bonus within 15 days.
How it works: Banks offer cash bonuses to new customers who open an account and meet set requirements, and some bonuses are big enough to cover the full $400 on their own. Chase, for example, has offered new checking customers $400 for opening a Chase Total Checking account and receiving $1,000 or more in direct deposits within 90 days. Bonus amounts, requirements and deadlines change regularly, so check the bank’s current terms before you apply.
Before you sign up, confirm three things: what counts as a direct deposit, whether you qualify as a new customer and whether the account charges a monthly fee. Chase’s offer, for example, counts only paychecks, pensions and government benefits as direct deposits, not Zelle payments or transfers from another bank. To find an offer you qualify for, compare current bank account bonuses.
Is it online? Yes.
How long it takes to earn $400: Could be under a week if you land a project quickly, but building a client base takes longer.
How it works: If you have writing, design, editing, bookkeeping or admin skills, create a profile on Upwork, Fiverr or a dedicated virtual assistant platform, or reach out to past employers and colleagues. One larger project, like a simple website, a logo or a résumé package, can cover the full $400, while smaller gigs get you there in a few jobs. A narrow service with a package price is easier to sell. AI tools can also speed up drafts and research.
Is it online? Yes.
How long it takes to earn $400: Two or three focus groups, though the timing depends on when you’re invited. Focus groups and in-person studies pay the most, averaging $250 per session, according to Respondent.
How it works: Platforms like Respondent match companies with people who fit a specific profile for interviews, focus groups, surveys and diary studies. Each study has its own screening questions, and you get an invite only when your background fits. Respondent’s average payout is $75, most participants get one to three invitations a month and senior business roles regularly pay $400 or more per session. Respondent sends payment through Tremendous once your session is verified. You can also try research platforms like Prolific.
Is it online? Mostly. Many studies run over video call, though in-person studies also exist.
How long it takes to earn $400: Searching takes minutes, but there’s no guarantee you’ll find anything. If you do, some states process claims in less than 30 days, according to the National Association of Unclaimed Property Administrators (NAUPA).
How it works: When there’s been no activity or contact with the owner of an account or payment for a set period, the company must turn it over to the state by law, according to NAUPA. Common examples include uncashed paychecks, checking accounts and utility security deposits. Search your name (and any past names) through your state’s official unclaimed property program, which NAUPA’s site links to, or on MissingMoney.com, a free NAUPA-sponsored site that most states participate in.
Is it online? Yes.
How long it takes to earn $400: Signing up takes minutes, but Finder sends rewards at the end of each offer’s eligibility period, which can be weeks or months later. Pair rewards with a faster method to close the gap.
How it works: Reward programs pay you for taking actions you might already be considering, like opening an investing or bank account. Finder Rewards is one example: it’s free for Finder members, eligible products carry a Finder Rewards Exclusive badge and Finder sends rewards as a digital Visa gift card at the end of each offer’s eligibility period. Finder says to log in when you browse and take action on eligible products. Offers rotate, so check what’s live first.
Referral programs work the other way. Once you’re a customer, you earn a reward when a friend signs up. Existing Chase checking customers, for example, can earn $50 for each friend who opens a qualifying account, up to $500 a year, according to Chase.
Is it online? Yes.
How long it takes to earn $400: Likely several months for most people, since individual tasks pay small amounts.
How it works: Get-paid-to (GPT) platforms and survey sites reward you for completing surveys, playing mobile games, hitting in-app milestones or signing up for offers from third-party providers. Payouts per task are usually small, so treat it as background income alongside a faster method. For more options, compare money-making apps.
Is it online? Yes.
Some methods are legit but pay in small amounts, so $400 would take months. Website and app testing and game apps that pay work better as background income during downtime rather than as a plan for a $400 deadline.
If your bill is due before any of these methods pay out, borrowing may be your only option. Each choice comes with its own costs and terms, so compare them before you commit.
The Finder Score crunches 3+ types of short-term loans across 65+ lenders. It takes into account the product's interest rate, fees and features, as well as the type of loan eg investor, variable, fixed rate - this gives you a simple score out of 10.
To provide a Score, we compare like-for-like loans. So if you're comparing the best short-term loans for all credit types, you can see how each short-term loan stacks up against other short-term loans with the same borrower type, rate type and repayment type.
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