Everywhere else in this series, the financial-caution conversation has been about a document: a prenup, a credit score, a debt disclosure, something someone actively signs or shares to define the terms in advance. Denver inverts the entire premise. In Colorado, two people can become legally, financially married to each other without ever signing anything at all — no ceremony, no license, no minimum amount of time together required. All it takes is both people intending to be married and living in a way that shows it.
That's not a historical curiosity. It's current, binding Colorado law, and it makes Denver the one city in this series where the caution has to start well before anyone brings up a prenup — because the ordinary, low-key milestones of a serious relationship elsewhere can, here, be the marriage itself.
How little it actually takes
Colorado is one of only a handful of U.S. states that still allow new common-law marriages to form, and the state's current legal standard, set by the Colorado Supreme Court in its 2021 decision In re Marriage of Hogsett & Neale, is genuinely permissive: a couple forms a valid common-law marriage when both parties mutually intend to be married and conduct their lives in a way that manifests that intent. There is no minimum number of years of cohabitation required. Courts look at exactly the kind of ordinary relationship evidence most couples generate without thinking about it as legally significant: joint bank accounts, joint tax filings, referring to each other as husband and wife, shared last names, and how a couple presents itself to friends, family, and employers.
Once that marriage exists, it carries every legal consequence of a ceremonial one. Colorado is an equitable-distribution state, so a common-law marriage that ends is subject to the same property-division framework — courts divide marital property based on what's fair, not necessarily equal, per C.R.S. § 14-10-113 — and a common-law spouse can seek spousal maintenance under the same factors as anyone else. The IRS treats a valid common-law marriage as a marriage for federal tax purposes, meaning joint filing status and its associated deductions and credits apply. Under federal retirement-plan rules, a spouse — common-law or otherwise — is automatically the default beneficiary of most 401(k) and pension accounts, and naming someone else requires the spouse's written, notarized waiver. And critically, there is no such thing as an informal end to a common-law marriage: simply moving out or agreeing to separate doesn't dissolve it. Until a Colorado court enters a formal decree, the marriage — and every one of its financial obligations — legally continues.
What this does to ordinary relationship escalation
Every other city in this series has covered some version of the instinct to verify a partner's finances before committing further. Denver adds a layer underneath that: the everyday behaviors that read as normal relationship progression almost anywhere else — moving in together, opening a joint account to split rent more easily, referring to a partner as "my husband" or "my wife" at a dinner party, filing taxes together because an accountant suggested it was simpler — are the specific fact pattern Colorado courts use as evidence that a marriage already exists. A couple can be building exactly the kind of joint financial life a prenup conversation is supposed to precede, without ever having had the conversation, and can find out only in retrospect, sometimes during a dispute, that the state already considered them married the whole time.
Family law attorneys in Colorado who work with couples trying to avoid this outcome generally recommend the opposite of a prenup: an explicit, written cohabitation agreement stating that the couple does not intend to be married, alongside consistently avoiding the language and financial habits — joint tax filing, "spouse" terminology, commingled accounts — that a court would read as evidence of intent. That's a genuinely unusual thing to have to actively manage in a modern relationship, and it's specific to a small number of states, Colorado chief among them for how loosely the standard is now applied following Hogsett.
The cost backdrop underneath it
Denver's cost of living gives this extra weight, because it isn't the bargain its reputation as a Mountain West alternative to the coasts might suggest. Median rent across the city runs approximately $1,600 to $1,900 a month as of 2026, and estimates of what a single person needs to live comfortably cluster in the high $70,000s to high $90,000s depending on the source — genuinely above the national average, and well above Denver's own median individual salary in several analyses. Colorado applies a flat state income tax around 4.4%, on top of federal tax, which further narrows the gap between a comfortable Denver income and a merely adequate one. None of that is unique to Denver, but it does mean the financial stakes of an accidental marriage — joint tax liability, automatic retirement-beneficiary status, a shared marital estate — attach to a genuinely nontrivial amount of money for most of the city's professional dating pool.
What Colorado's own scam numbers say
The instinct toward financial caution generally isn't abstract here either. In 2024, 409 Colorado victims reported losing more than $15.8 million to romance scams, according to the FBI's Internet Crime Complaint Center — consistent with a national picture in which Americans lost more than $672 million to the same category that year, a figure the FBI's 2025 Internet Crime Report shows climbing further, to over $929 million nationally, the highest annual total on record.
The same national instinct, running through a Denver-shaped filter
The broader financial-caution data holds here the way it does everywhere else in this series. Credit Karma's national survey found 66% of dating-app users consider it important that a partner have good credit, and 87% say they're specifically interested in someone financially responsible. Earnest's 2026 Debt and Dating Research Report found 55% of daters consider at least one type of debt an automatic dealbreaker. Bankrate's research found 40% of Americans in committed relationships have hidden a financial secret from a partner. Nationally, the prenup trend continues regardless — 53% of engaged or married Americans under 45 had signed one as of May 2026 — but in Denver, the more urgent version of that conversation for an unmarried couple moving in together isn't just "should we sign something." It's "do we understand that Colorado might already consider us married, and is that actually what we intend."
Why a room does something a profile in this city genuinely can't
None of the information that actually matters here — whether someone understands the legal weight of moving in together in this specific state, whether their account of a live-in relationship holds up under a real follow-up question, whether they're the kind of person who'd have an honest conversation about intent before the state has one for them — is something a static dating profile can carry. A bio doesn't disclose whether someone already has an unresolved common-law marriage sitting in their past, a detail more than one Colorado family law attorney has flagged as a real and recurring surprise in this state specifically.
That's the gap Relish's Denver evenings are built to close — recurring nights at rooms like AC Bar and Kitchen downtown and Millers & Rossi, in a city where the questions worth asking early are genuinely different from the rest of the country. A real conversation, held across a table, tells you more in a few minutes about whether someone is financially grounded and clear-eyed about what a serious relationship here actually entails than any profile in this city ever will.
Sources referenced
Colorado Supreme Court, In re Marriage of Hogsett & Neale, 2021 CO 5
C.R.S. § 14-10-113 (property division) and § 14-10-110 (dissolution); Recording Law, Divorce.law, and Flatiron Legal Advisors, Colorado common-law marriage analyses, 2026
LegalClarity, Colorado common-law marriage and federal tax/retirement-plan implications, 2026
Apartment List / CityWage / iBuyer, Denver cost-of-living and salary-needed analyses, 2026
FBI Internet Crime Complaint Center (IC3), Colorado and national romance scam data, 2024–2026
Denver7 / FBI Denver Field Office, romance scam reporting, February 2026
Harris Poll for Bloomberg, national prenup adoption data, 2026
Credit Karma / Harris Poll, dating app credit-score survey, 2024
Earnest, 2026 Debt and Dating Research Report
Bankrate, Financial Infidelity Survey, 2025–2026
All figures above are drawn from the publicly cited studies and reports listed. Where a source was cited secondhand through another publication, that's noted — worth verifying against the original study before publication if you want primary-source links rather than secondary citations.
Relish hosts structured social evenings for driven professionals across Denver — including recurring evenings at AC Bar and Kitchen downtown and Millers & Rossi — as part of 50+ cities in the US, UK, Canada and Australia since 2014. Find a Denver evening →